The partitioning powers (in particular, Russia) demanded that the Sejm passes further reforms, with the intent of strengthening their power over the Commonwealth, and the original commission was allowed to work till January 1774, extending the Sejm which was adjourned again.
The Sejm passes further reforms. This is with the intent of strengthening their power over the Commonwealth. This was what the partitioning powers (in particular) demanded. Particular was Russia. The original commission was allowed to work till January 1774, extending the Sejm. This Sejm was adjourned again.