U.S. Rep. Markwayne Mullin can no longer appear in ads for his plumbing company or continue his home improvement radio show, the House Ethics Committee said Friday while mostly absolving the Oklahoma Republican after a five-year review.

The committee, composed of Republican and Democratic members of the House, rejected concerns from the outside Office of Congressional Ethics that Mullin may have violated House rules and federal law by accepting more than $600,000 in earned income from his plumbing company, well above the $27,000 limit for House members.

The Office of Congressional Ethics, which is authorized under the law to investigate complaints against lawmakers and make referrals to the House ethics committee, also alleged that Mullin “may have violated House rules and standards of conduct by being personally involved in endorsing services pursuant to outside employment.”

The Office of Congressional Ethics made its referral to the ethics committee in late 2013.