Not sure of what stipulation you may be refering to; but, for kicks if it was "lifted", when would one be able to write the exams, keeping in mind that the exams are "good" for 24 months?421.13 Examination Prerequisites
(1) For admission to a written examination required for the issue of a permit, licence or rating an applicant shall have met the medical standards for the issue of the permit, licence or rating and shall produce proof of medical fitness in one of the following forms:
(a) a Medical Certificate in the appropriate medical category;
(b) a Medical Assessment Letter (Form 26-0417) in the appropriate medical category;
(c) in the case of a Student Pilot Permit - Aeroplane, Pilot Permit - Ultra-light Aeroplane or Pilot Licence - Glider, a Civil Aviation Medical Declaration (Form 26-0297);
(d) a temporary Medical Certificate in the appropriate medical category; or
(e) a Medical Examination Report assessed to the appropriate medical category by the Regional Aviation Medical Officer.
(2) For admission to a written examination, proof of identification shall be required in the form of a permit, licence or other official document bearing the signature and photograph of the candidate.
(amended 2005/12/01; previous version)
(3) To be eligible to write the examination required for the issue of a permit, licence or rating, the candidate shall produce the following letter of recommendation dated within 60 days prior to the date of the written examination:
(amended 2005/12/01; previous version)
(a) an applicant for a Pilot Permit - Gyroplane, Private Pilot Licence, or Commercial Pilot Licence shall provide a letter of recommendation from the Flight Training Unit or from the flight instructor who is responsible for the training of the applicant, stating that the applicant has completed the ground school instruction, and has reached a sufficient level of knowledge to write the examination;
(amended 2000/09/01; previous version)
(b) an applicant for a Class 4 Instructor Rating shall provide a letter of recommendation from the applicant’s ground training instructor stating that the applicant has completed the ground school instruction, and has reached a sufficient level of knowledge to write the examination;
(amended 1998/03/23; previous version)
(c) in the case of a DND applicant, proof of having qualified to pilot wings standard;
(d) in the case of an applicant holding a licence issued by a Contracting State, the recommendation shall not be required provided the applicant is applying for the equivalent or lower Canadian licence;
(amended 2005/12/01; previous version)
(e) a letter of recommendation required under this subsection may only be used once.
(amended 2003/03/01; no previous version)
(4) To be eligible to write the examination required for the issue of a permit, licence or rating, the candidate shall provide proof that the experience and training requirements set out below have been met:
(amended 1998/03/23; previous version)
(a) an applicant for a Pilot Permit - Gyroplane, Pilot Permit - Recreational-Aeroplane, or a Private Pilot Licence shall have completed 10 hours flight time in the same category of aircraft, or hold a valid Pilot Permit - Ultra-light Aeroplane;
(amended 1998/03/23; previous version)
(b) an applicant for a Class 4 Instructor Rating shall have completed fifty percent (50%) of the flight training requirement, and all ground school requirements;
(c) an applicant for a higher class of Instructor Rating shall have completed fifty percent (50%) of the flight instructor experience requirement;
(d) an applicant for an instrument rating shall have completed a minimum of 20 hours of instrument flight or ground time;
(amended 1998/03/23; previous version)
(e) an applicant for an Airline Transport Pilot Licence (Aeroplane) shall, when enrolled in an approved integrated ATP(A) course, have completed the ground school requirements and the Group 1 instrument rating flight test; and
(amended 2005/12/01; previous version)
(f) all other applicants shall have a minimum of fifty percent (50%) of the total flight experience for the issue of the permit, licence, or rating.
(amended 2005/12/01; previous version)
The problem I see is that the newly minted CPL (250 Total Time, we'll assume) is allowed to write them earlier than 750, they still have to get up to 1500. My guess is that the test(s) will "expire" well before they reach the required hours to hold the "AA's"
