Exhibit 3.66

                    CERTIFICATE OF CHANGE OF REGISTERED AGENT

                                       AND

                                REGISTERED OFFICE

                                    * * * * *

            Broward Ambulance; Inc., a corporation organized and existing under
and by virtue of the General Corporation Law of the State of Delaware, DOES
HEREBY CERTIFY:

            The present registered agent of the corporation is

            The Prentice-Hall Corporation System, Inc. and the present
registered office of the corporation is in the county of New Castle

            The Board of Directors of Broward Ambulance, Inc. adopted the
following resolution on the 22 day of November, 1995.

            Resolved, that the registered office of Broward Ambulance, Inc. in
the state of Delaware be and it hereby is changed to Corporation Trust Center,
1209 Orange Street, in the City of Wilmington, County of New Castle, and the
authorization of the present registered agent of this corporation be and the
same is hereby withdrawn, and THE CORPORATION TRUST COMPANY, shall be and is
hereby constituted and appointed the registered agent of this corporation at the
address of its registered office.

            IN WITNESS WHEREOF. Broward Ambulance, Inc. has caused this
statement to be signed by Robert H. Byrne, its Secretary*, this 22 day of
November 1995.

                                                /s/ Robert H. Byrne
                                                --------------------------------
                                                Secretary
                                                (Title)

*Any authorized officer or the chairman or Vice-Chairman of the Board of
Directors may execute this certificate.

(DEL. - 264 - 6/15/94)



                            CERTIFICATE OF AMENDMENT
                                       OF
                          CERTIFICATE OF INCORPORATION
                                       OF
                       BROWARD AMBULANCE ACQUISITION, INC.

            Broward Ambulance Acquisition, Inc., a corporation organized under
the General Corporation Law of the State of Delaware (the "Corporation"), hereby
certifies as follows:

            1. Article I of the Certificate of Incorporation of the Corporation
is hereby amended to read in its entirety as follows:

                                   "ARTICLE I

            The name of the Corporation is Broward Ambulance, Inc."

            2. The amendment set forth has been duly approved by the directors
of the Corporation and by the stockholders entitled to vote thereon.

            3. The amendment set forth was duly adopted in accordance with the
provisions of Section 242 of the General Corporation Law of the State of
Delaware.

            IN WITNESS WHEREOF, I, the undersigned, being the president of the
Corporation, for the purpose of amending the Certificate of Incorporation of the
Corporation pursuant to Section 242 of the General Corporation Law of the State
of Delaware, do make and file this certificate, hereby declaring and certifying
that the facts herein stated are true, and accordingly have hereunto set my
hand, this 21 day of August, 1992.

                                                /s/ George B. DeHuff III
                                                --------------------------------
                                                George B. DeHuff III

Attest:

/s/ Gerard A. Thompson
- ----------------------------
Gerard A. Thompson
Assistant Secretary

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                          CERTIFICATE OF INCORPORATION
                                       OF
                       BROWARD AMBULANCE ACQUISITION, INC.

                                    ARTICLE I
                               NAME OF CORPORATION

                         The name of this corporation is

                       Broward Ambulance Acquisition, Inc.

                                   ARTICLE II

                                REGISTERED OFFICE

            The address of the registered office of the corporation in the State
of Delaware is 32 Loockerman Square, Suite L-100, in the City of Dover, County
of Kent, and the name of its registered agent at that address is The
Prentice-Hall Corporation System, Inc.

                                   ARTICLE III

                                     PURPOSE

            The purpose of the corporation is to engage in any lawful act or
activity for which corporations may be organized under the General Corporation
Law of Delaware.

                                   ARTICLE IV

                            AUTHORIZED CAPITAL STOCK

            The corporation shall be authorized to issue one class of stock to
be designated Common Stock; the total number of shares which the corporation
shall have authority to issue is one thousand (1,000), and each such share shall
have a par value of one cent ($.01).

                                       3


                                    ARTICLE V

                                  INCORPORATOR

     The name and mailing address of the incorporator of the corporation is:

                               Gerard A. Thompson
                      620 Newport Central Drive, Suite 1450
                         Newport Beach, California 92660

                                   ARTICLE VI

                          BOARD POWER REGARDING BYLAWS

            In furtherance and not in limitation of the powers conferred by
statute, the board of directors is expressly authorized to make, repeal, alter,
amend and rescind the bylaws of the corporation.

                                   ARTICLE VII
                              ELECTION OF DIRECTORS

            Elections of directors need not be by written ballot unless the
bylaws of the corporation shall so provide.

                                  ARTICLE VIII

                        LIMITATION OF DIRECTOR LIABILITY

            To the fullest extent permitted by the Delaware General Corporation
Law as the same exists or may hereafter be amended, a director of the
corporation shall not be liable to the corporation or its stockholders for
monetary damages for breach of fiduciary duty as a director. If the Delaware
General Corporation Law is amended after the date of the filing of this
Certificate of Incorporation to authorize corporate action further eliminating
or limiting the personal liability of directors, then the liability of a
director of the corporation shall be eliminated or limited to the fullest extent
permitted by the Delaware General Corporation Law, as so amended from time to
time. No repeal or modification of this Article VIII by the stockholders shall
adversely affect any right or protection of a director of the corporation
existing by virtue of this Article VIII at the time of such repeal or
modification.

                                        4



                                   ARTICLE IX

                                 CORPORATE POWER

            The corporation reserves the right to amend, alter, change or repeal
any provision contained in this certificate of incorporation, in the manner now
or hereafter prescribed by statute, and all rights conferred on stockholders
herein are granted subject to this reservation.

                                    ARTICLE X

                       CREDITOR COMPROMISE OR ARRANGEMENT

            Whenever a compromise or arrangement is proposed between this
corporation and its creditors or any class of them and/or between this
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this corporation or of any creditor or stockholder thereof or on the
application of any receiver or receivers appointed for this corporation under
the provisions of section 291 of Title 8 of the Delaware Code or on the
application of trustees in dissolution or of any receiver or receivers appointed
for this corporation under the provisions of Section 279 of Title 8 of the
Delaware Code order a meeting of the creditors or class of creditors, and/or of
the stockholders or class of stockholders of this corporation, as the case may
be, to be summoned in such manner as the said court directs. If a majority in
number representing three-fourths in value of the creditors or class of
creditors, and/or of the stockholders or class of stockholders of this
corporation, as the case may be, agree to any compromise or arrangement and to
any reorganization of this corporation as a consequence of such compromise or
arrangement, the said compromise or arrangement and the said reorganization
shall, if sanctioned by the court to which the said application has been made,
be binding on all the creditors or class of creditors, and/or on all the
stockholders or class of stockholders, of this corporation, as the case may be,
and also on this corporation.

                                       5


            THE UNDERSIGNED, being the incorporator hereinbefore named, for the
purpose of forming a corporation to do business both within and without the
State of Delaware, and in pursuance of the Delaware General Corporation Law,
does hereby make and file this Certificate.

Date: March 25, 1992

                                                /s/ Gerard A. Thompson
                                                --------------------------------
                                                Gerard A. Thompson

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