This is how the SEC says it will be trading on the Grey Market.
You didn't read the link did you?
"Further, brokers and dealers should be alert to the fact that, pursuant to Rule 15c2-11 under the Exchange Act, at the termination of the trading suspension, no quotation may be entered unless and until they have strictly complied with all of the provisions of the rule. If any broker or dealer has any questions as to whether or not he has complied with the rule, he should not enter any quotation but immediately contact the staff in the Division of Trading and Markets, Office of Interpretation and Guidance.
If any broker or dealer is uncertain as to what is required by Rule 15c2-11, he should refrain from entering quotations relating to ACT’s securities until such time as he has familiarized himself with the rule and is certain that all of its provisions have been met. If any broker or dealer enters any quotation which is in violation of the rule, the Commission will consider the need for prompt enforcement action.