Go read the article I posted from some context.
You and others stated there was no dress code - at noted in the New York Time there has been a written dress code for decades.
The question regarding the enforcement of the dress code is a different manner. However the enforcement on reporters has been going on for a long time including requiring male reporters to where jackets and ties.
Again the NR and the Yahoo article never mention that the 'sleeveless top' policy was enforced - only that there was a dress code. Ryan decided on this specific dress code, Pelosi didn't enforce any sleeveless top policy.