During the Axis attrition phase, is the Allied mechanized units supply status checked in order to assess if they have a ZOC at this instant.
I would say yes even if its not explicitly stated in the rules
11.1 Supply determination
Units must be in supply to perform most actions. Supply is determined:
- at the instant of activation for movement, combat, Redeployment, or using Replacement Points,
- during combat for the Defender,
- during the Attrition Phase for each side.
May be stated if "during the Attrition Phase for each side" means that during the Axis attrition phase both sides check their supply status but only the Axis OOS units are eliminated.
Sorry if this is clear but as English is not my mother tongue sometimes I may not get some subtleties (and as second excuse I am Belgian ).