1) Here's my understanding. I think s.II.10 is a bit confusing because it starts by saying the legislature can amend/repeal. But it can only do so by putting the issue to a popular vote. So the legislature is drafting but it's really voters who decide whether to amend/repeal.

2) The legislature can amend/repeal without a popular vote if the initiative proponent gives them permission in the initiative text to do so. But, initiative proponents can attach conditions to that permission.

3) Prop 22 reads: "the Legislature may amend this chapter by a statute passed in each house of the Legislature by rollcall vote entered into the journal, seven-eighths of the membership concurring"