Exhibit 99.1

                   Important Notice Concerning Limitations on
                       Trading in NCRIC Group, Inc. Stock
                       ----------------------------------
                                                            July 1, 2005

To:      Executive Officers and Directors of NCRIC Group, Inc.

From:    NCRIC Group, Inc.


1.    As you may know, a "blackout  period" will be imposed on  transactions
      involving  the NCRIC Group,  Inc. ("NCRIC") common stock fund (the
      "NCRIC stock fund") under the NCRIC Group, Inc. Profit Sharing Plan &
      Trust (the "401(k)  Plan"). This blackout  period,  described in more
      detail below,  is necessary in order for the 401(k) Plan trustees to
      process and implement  participants'  instructions  with respect to the
      conversion of NCRIC common  stock for shares of stock in NCP Merger
      Corporation  ("NCP"),  a wholly  owned  subsidiary of ProAssurance
      Corporation  ("PRA")  in  response  to the merger  contemplated  by the
      Agreement and Plan of Merger, dated as of February 28, 2005, by and among
      NCRIC,  NCP  and PRA  (the  "Merger").  Under  the Sarbanes-Oxley  law
      enacted in 2002,  the  executive  officers  and  directors  of NCRIC will
      generally  be prohibited  from engaging in  transactions  involving NCRIC
      equity  securities  (including  options and other derivatives  based on
      NCRIC stock) during this blackout  period.  Dispositions of equity
      securities of NCRIC in connection with the Merger are exempt under
      Sarbanes-Oxley from the blackout period trading restrictions.

2.    As a result of the need to process participants' accounts due to the
      Merger, during the blackout period, participants in the 401(k) Plan will
      be temporarily unable to (1) make exchanges into or out of the NCRIC stock
      fund under the 401(k) Plan, (2) take distributions of money invested in
      the NCRIC stock fund, and (3) take loans of money invested in the NCRIC
      common stock fund.

3.    The blackout period for the 401(k) Plan is expected to begin on or about
      July 20, 2005 and end on or about August 16, 2005. The blackout period
      will also be lifted promptly if the Merger is not completed. We will
      notify you of any changes that affect the dates of the blackout period. In
      addition, you can confirm the status of the blackout period by speaking
      with Jo Anne R. Wiggins, Human Resources at (202) 969-3141.

4.    Generally, during the blackout period, you are prohibited from directly or
      indirectly, purchasing, selling or otherwise transferring any equity
      security of NCRIC that you acquired in connection with your service as an
      executive officer or director. "Equity securities" are defined broadly to
      include options and other derivatives. Covered transactions are not
      limited to those involving your direct ownership, but include any
      transaction in which you have a pecuniary interest. As indicated above,
      however, dispositions of equity securities of NCRIC in connection with the
      Merger are excluded from the trading restrictions.

5.    The prohibition  covers securities  acquired "in connection with service
      as a director or employment as an executive  officer."  This includes,
      among other things,  securities  acquired under a compensatory  plan or



      contract (such as under a stock option, or a restricted stock grant),  as
      a direct or indirect  inducement to employment or joining the Board of
      Directors,  in  transactions  between the individual and the company,  and
      as director  qualifying  shares.  Securities  acquired  outside of an
      individual's  service as a director or executive officer (such as  shares
      acquired  when the  person  was an  employee  but not yet an  executive
      officer) are not covered.  Shares acquired in  open  market  purchases as
      well  as  shares  acquired in connection  with NCRIC's  conversion from
      the mutual to stock form (first and second step) are not subject to
      the blackout  trading  restrictions.  However,  if you hold both covered
      shares and non-covered  shares, any shares that you sell will be presumed
      to come first from the covered  shares  unless you can  identify the
      source of the sold shares and show that you use the same identification
      for all related purposes (such as tax reporting and disclosure
      requirements).

6.    The following are examples of transactions that you may not engage in
      during the blackout period:

      >> Exercising stock options granted to you in connection with your
         service as a director  or  executive officer

      >> Selling NCRIC stock that you acquired by exercising options

      >> Selling NCRIC stock that you originally received as a restricted stock
         grant

7. There are certain exemptions, including:

      >> Purchases or sales under 10b5-1(c) trading plans (so long
         as you do not make or modify your election during the
         blackout period or at a time when you are aware of the
         actual or approximate dates of the blackout)

      >> Bona fide gifts, bequests and transfers pursuant to domestic relations
         orders

      >> Acquisitions  and dispositions of equity securities in connection with
         a merger, aquisition, divestiture, or similar transaction

8.    If you engage in a transaction that violates these rules, you can be
      required to disgorge your profits from the transaction, and you are
      subject to civil and criminal penalties.

The rules summarized above are complex, and the criminal and civil penalties
that could be imposed upon executive officers and directors who violate them
could be severe.

We therefore request that you contact Jo Anne R. Wiggins, Human Resources at
(202) 969-3141 before engaging in any transaction involving NCRIC stock or
derivatives based on NCRIC stock during the blackout period, or if you believe
that any such transaction in which you have a pecuniary interest may occur
during the blackout period.