It read to me like one proposal with 3 parts.
So, only 1 vote required.
Part 1. Vote yes to letting Sevco into the SFL, Part 2. as a result of Part 1, yes to Sevco in Div 3, unless the SFL and SPL boards come to a sweetheart deal to let them in Div 1, and yes to allowing Dunf/Dund leave the SFL without the requisite notice being given.
Would the SFL chairmen be brave enough to vote no to sevco at all ?