A:
You're right: nothing in RONR requires that the minutes be approved before a motion can take effect.
Delaying their approval serves no purpose.
If the board is subordinate to the assembly, then you may raise a Point of Order at a regular (non-board) meeting of your society, claiming your right as a member of the board.
If the President rules the point not well taken, you may Appeal the decision of the chair.
This leaves the ruling of your Point of Order in the hands of the assembly.
See RONR Sections 23 and 24.