17.4 Reinforcements may not be placed in a position where they would exceed stacking limits. If for any reason reinforcements can not be received, they are lost. 21.8 Special Rule - Invader noncooperation Units from different invader coalitions may not stack together or combine strengths in combat. Other invader coalitions' units are considered enemy units for the purposes of tracing supply, etc. Note that the USA and Canada are considered as one country for all purposes except appearance of reinforce ments.
Naval transport has no range limitation.
Ports may not be 'carried' by naval units as they are by amphibious units. 21.10 Special Rule - Amphibious Assault Location Restriction. ESC and SAU units may only make amphibious assaults on the Atlantic coast of North America. PAL units may only make amphibious assaults on the Pacific coast of North America. Deploy in Cuba.