I would amend and send out.

My contract also says I may close early and will provide 30 days notice. If I close at noon (not feed kids lunch) I only charge $20. If I close later it is regular fees. My contract does say I will be closing early on Christmas Eve and New Year's Eve as well as Halloween.

My contract also reads that I will give a new copy of my contract to everyone yearly and I reserve the right to make changes to my contract on a yearly basis. I do not get anything resigned but I keep my email that shows parents have received it.