Short Answer
Yes, for all intents and purposes.
Explanation
The administrative process related to the deferral of Rule 4210 has become a perennial source of confusion, given the perennial deferral of margining on to-be-announced securities (or what can be described as the delayed delivery of margin on TBAs (pun intended), not that anybody is complaining about these deferrals).
So, we have distilled this administrative process down to a few bullet points: