I take it that the hon. Member's proposal relates solely to Members of this House who are classified as self-employed under the National Insurance Act. Self-employed persons will be individually liable for ensuring that their National Insurance contribution cards are properly stamped. Subject to that liability, it is open to them to make suitable arrangements with responsible agents for stamping their cards. As regards Members of Parliament, I understand that the Fees Office would be prepared on authorisation to undertake to stamp the card of a Member by whom self-employed contributions are payable and to adjust salary payments accordingly.