The White House oil spill commission has asked the US Interior Department to provide details about whether any rigs covered by the agency’s blanket deepwater drilling ban are safe enough to resume operations.

The commission requested details about the safety reviews that have accompanied the drilling moratorium, which has idled 33 rigs in the Gulf of Mexico, reports Reuters.

In a letter to the Bureau of Ocean Energy Management, the commission expressed its interest in finding out whether individual rigs, or categories of rigs, are sufficiently safe to allow the moratorium to be lifted.

Last week the commission said the ban may be lifted ahead of its November deadline.

Oil producers have opposed the ban since it was enforced, arguing that it will cause damage to the region’s economy as offshore operators move their idle rigs to foreign waters.