TL;DR: You are welcome to ask for approval for attending a BSP or similar; it's only the automatic approvals on hold.
I heard two different people in an email thread claim that you cannot get reimbursed for attending a BSP. The only thing that is on hold right now is *automatic approvals*. Just ask first. At one level that might create more work. If it does, it will push getting a real policy up the priority queue. At another level, my frustration mostly surrounded documentation of expenses and being in a position where people asking for approval and I had different ideas about which contributors should be approved. Asking for pre-approval reduces the emotional cost to me significantly. --Sam