Question:
Can the British 52 XX switch between forms, that is, 6-8* Glider, 7-8 Mtn, or 8-8 Inf XX at will?

Answer:
NO! The 52nd can make each conversion only once during a game. It begins playas a 7-8 Mtn XX which can be converted into either the 6-8* Glider or the 8-8 Inf. In the same game, the 6-8* Glider XX (and its ex-organic infantry brigade) can be converted into the 8-8 Inf XX.

Note that once you have converted from the Mtn incarnation, you can never return to it; note that the Glider XX can only convert into the Inf XX and that you can not convert the Inf XX into anything at all.

This conversion is not like the SAS conversions, wherein the units involved in those conversions may go back and forth — that is, you can decide each game turn (as long as the involved units meet the requirements for conversion) which version of the unit you wish to use, either naval-commando or para-commando. But with the 52nd XX, it is a once a game choice for each incarnation. Basically, remember that the 52nd XX can never return to a version from which it has been converted.

Source:
TEM 53