Motion 25 schedules an increase of validators slots by 1 every era (14,400 blocks) with a repetition of 100 eras.
The motion is to be voted on referenda queue if passed by council for approx. 7 days, after the TC fast-tracks, as explained here. Councillors: to verify presage hash you can check here. Feel free to add any comments or questions.
Original proposal: https://polkadot.polkassembly.io/post/93