The amendments to AB 51 will be in print on Thursday, June 2. I was advised that the Senate Transportation Committee may ask Assemblymember Quirk to make some technical changes to the bill to clean it up but not change the substance of the bill - see link to the amended bill Quirk submitted to committed today.
AB 51 is tentatively scheduled to be heard on June 14.
As for what "educational" guidelines the CHP may develop, we will have to wait and see. I'm not going to assume they will just reinstate their previous guidelines.