50 For the purposes of subsection 45(1) of the Act, a member or veteran is presumed, in the absence of evidence to the contrary, to have established that an injury or disease is a service-related injury or disease, or a non-service-related injury or disease that was aggravated by service, if it is demonstrated that the injury or disease or its aggravation was incurred in the course of
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(b) any activity incidental to or directly connected with an activity described in paragraph (a), including the transportation of the member or veteran by any means between the place at which the member or veteran normally performed duties and the place of the activity;
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(c) the transportation of the member or veteran, in the course of duties, in a military vessel, vehicle or aircraft or by any means of transportation authorized by a military authority, or any act done or action taken by any person that was incidental to or directly connected with that transportation;
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(d) the transportation of the member or veteran while on authorized leave by any means authorized by a military authority, other than public transportation, between the place at which the member or veteran normally performed duties and the place at which the member or veteran was to take leave or a place at which public transportation was available;