As a step towards [Economic Model for System Para Collators](https://forum.polkadot.network/t/economic-model-for-system-para-collators/1010), this motion reduces the number of "invulnerable" collators on Statemint from four to two, and opens six positions that anyone can register in by placing a bond.

The call consists of three parts:

1. [Set the bond to 1,000 DOT](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fstatemint-rpc.polkadot.io#/extrinsics/decode/0x150200a0724e180900000000000000000000) (weight: 114,791,000)
2. [Reduce the Invulnerables from four to two](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fstatemint-rpc.polkadot.io#/extrinsics/decode/0x1500084c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811) (weight: 177,434,000)
3. [Set the desired number of non-invulnerable collators (from zero) to six](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fstatemint-rpc.polkadot.io#/extrinsics/decode/0x150106000000) (weight: 114,572,000)

Since `batch` calls are not expected to work over XCM in v9290, the message in this motion contains three separate `Transact` instructions.

All three of these calls require the `UpdateOrigin`, which is set to "more than 50% of the Council". Therefore, I have opened this as a motion requiring approval from 7 of 13 councillors. If discussion shows that people think that this is controversial, then we can reject the motion and make it a referendum.

I also recommend leaving this open for a few days to make sure that node operators can set up their Statemint nodes.

- The motion is about changing the number of collators on Statemint.
- It reduces the number of "invulnerable" collators from four to two.
- It opens six positions for anyone to register by placing a bond.
- The bond is set to 1,000 DOT.
- The motion requires approval from 7 out of 13 councillors.

#291 Open Permissionless Collator Registration on Statemint