And on the 61st day, I expect a slew of legal challenges to this “order”
It will be much longer than 61 days for the legal challenges.
This will follow the established "Notice of Proposed Rulemaking" process. The proposed rules will be posted in the Federal Register, followed by a set time period for public comments. Then the agency has to read, summarize, and respond to each public comment. This will take 6 months at least.
Then the agency either withdraws or makes final the proposed rule.
At that point, once the proposed rule is adopted, that the litigation begins.