Privileges of commercial pilot licence (aeroplane)
61.05.9
(1) The holder of a valid commercial pilot licence (aeroplane) shall, in the type of aeroplane for which he or she is rated,
be entitled to -
(a) exercise all the privileges of a private pilot licence (aeroplane);
(b) act as pilot-in-command in any aeroplane operations other than commercial air transport operations;
(c) act as pilot-in-command in commercial air transport operations in any aeroplane certified for single-pilot
operations;
(d) act as co-pilot in commercial air transport operations in any aeroplane required to be operated with a copilot;
(e) act as a tug and safety pilot; and
(f) exercise all the privileges referred to in this sub-regulation by night.
(2) The holder of the licence shall be entitled to exercise the privileges of the licence for any of the special purposes
referred to in regulation 61.05.10(1), if the holder holds the appropriate valid rating.
Pretty straightforward. You can only fly PIC on single-pilot aircraft with a comm.
Anyone care to post the B1900 limitation referred to in Prop Job's post?