Its been a long time - but if I remember correctly:
AVOTP - Annual Voluntary Occupational Transfer Program - provides an opportunity for individuals to change occupations. Limited by the requirements of the loosing Occupation (trying to maintain the occupation's capabilities by not loosing too great a % of trained personal), the training capacity and the force level of the gaining occupation, amongst others.
LOTP - Land Occupation Transfer Program - designed/implemented in the late 70's / early 80's to provide an incentive to join the Cbt Arms occupations/to retain Cbt Arms pers who where looking for a career change (often by releasing). Similar limits to AVOTP, but originally meant to be a preferential OT program for Cbt Arms NCM to retain the military skills acquired in the Cbt Arms, and useful in Non-Cbt Arms occupations.
In my opinion, the management of the LOTP has been spotty from the beginning of the program, and has not been used or promoted appropriately.
BCOG