EXHIBIT 3.19 - -------------------------------------------------------------------------------- BUSINESS CORPORATIONS ACT FORM 1 (SECTION 6) CONSUMER AND [LETTERHEAD OF ALBERTA] CORPORATE AFFAIRS ARTICLES OF INCORPORATION - -------------------------------------------------------------------------------- 1. NAME OF CORPORATION: NORTH AMERICAN SERVICES LTD - -------------------------------------------------------------------------------- 2. THE CLASSES, AND ANY MAXIMUM NUMBER OF SHARES THAT THE CORPORATION IS AUTHORIZED TO ISSUE: The Corporation is authorized to issue an unlimited number of shares of one class. - -------------------------------------------------------------------------------- 3. RESTRICTIONS ON SHARE TRANSFERS (IF ANY): No shares of the Corporation shall be transferred without the approval of the directors of the Corporation either by a resolution passed at a Board of directors meeting or by an instrument or instruments in writing signed by all of the directors. - -------------------------------------------------------------------------------- 4. NUMBER, OR MINIMUM AND MAXIMUM NUMBER, OF DIRECTORS THAT THE CORPORATION MAY HAVE: Minimum number of directors one (1) maximum number of directors seven (7). - -------------------------------------------------------------------------------- 5. IF THE CORPORATION IS RESTRICTED FROM CARRYING ON A CERTAIN BUSINESS, OR RESTRICTED TO CARRYING ON A CERTAIN BUSINESS, SPECIFY THE RESTRICTION(S): None - -------------------------------------------------------------------------------- 6. OTHER RULES OR PROVISIONS (IF ANY): See Schedule I attached hereto: - -------------------------------------------------------------------------------- 7. DATE: 91 / 12 / 13/th/ ------------------ YEAR MONTH DAY - -------------------------------------------------------------------------------- INCORPORATORS NAMES: ADDRESS (INCLUDING POSTAL CODE) SIGNATURE - -------------------------------------------------------------------------------- ROGER GOUIN 16745-111 Avenue /s/ Roger gouin Edmonton, Alberta T5M 2S4 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- FOR DEPARTMENTAL USE ONLY ____________ CORPORATE ACCESS NO. ____________ INCORPORATION DATE CCA-DE101 SCHEDULE I attached to the Articles of Incorporation of: NORTH AMERICAN SERVICES LTD 6. Other provisions if any: i. The number of shareholders of the Corporation, exclusive of: (a) persons who are in its employment or that of an affiliate, and (b) persons, who having been formerly in its employment or that of an affiliate were, while in that employment, shareholders of the Corporation and have continued to be shareholders of that Corporation after termination of that employment. is limited to not more than fifty (50) persons, two or more persons who are joint registered owners of one or more shares being counted as one shareholder. ii. Any invitation to the public to subscribe for securities of the Corporation is prohibited. Name Change Alberta Corporation - Registration Statement Service Request Number: 144868 Corporate Access Number: 205134463 Legal Entity Name: NORTH AMERICAN MAINTENANCE LTD. French Equivalent Name: Legal Entity Status: Active Alberta Corporation Type: Named Alberta Corporation Nuans Report Number: 60358240 Nuans Report Date: 1998/03/04 French Name Nuans Report Number: French Name Nuans Report Date: Future Dating Required: Professional Endorsement Provided: Amendment Date: 1998/03/09 - -------------------------------------------------------------------------------- Annual Returns - ---------------------- File Year Date Filed - ---------------------- 1996 1996/12/12 - ---------------------- 1995 - ---------------------- 1994 - ---------------------- Registration Authorized By: WILLIAM J. KENNY SOLICITOR 1 of 1