A group of lawmakers want the Securities and Exchange Commission to provide more official guidance on initial cryptocurrency coin offerings.

In a letter sent to SEC Chairman Jay Clayton Monday, 16 lawmakers —14 Republicans and two Democrats in the House of Representatives — asked for clearer guidelines on how he sees key financial regulations applying to the burgeoning digital assets. Reps. Ted Budd, R-N.C., Tom Emmer, R-Minn., Warren Davidson, R-Ohio, and Darren Soto, D-Fla., led the letter.