Is there a maximum number of AT days for a TPU (AR 140-1 says at least 14, but nothing about limits)?

"Length of AT. Units will serve on AT at least 14 days (exclusive of travel time) during each training year. The day of arrival and the day of departure from the training site are days of training. However, a portion of each of the arrival and departure days must be devoted to training. Except for oversea deployment training per AR 350–9, CONUS based units or individual soldiers will not serve more than 17 days AT each training year (including travel time) without prior approval of the CG, USARC. OCONUS based units require approval of the OCONUS Army commander.
Source: AR 140-1, chapter 3, 3-17 (Annual Training)

I have seen TPU soldiers not get 14 days AT for various reason, and it was authorized that you could have as many as 30 days if funding was available. Now that is not 30 days straight, in the reserves you cannot do over 29 days straight, because the system will not allow you to be paid, it will as for orders. This is how they RADARS system for orders works, if that is what they are still using works, under 8 days you get your pay input on the day the orders are submitted, which means you get paid after the orders, anything 8 days or more up to 29 days can be submitted once they have confirmation you are there and on mission, which means your pay will show up about the time the orders are submitted. Regular drill is submitted under a different system.

The most I have ever seen was for 29 days. Something to do with funding, I believe.