Each seated delegate to a convention for revising the constitution of Michigan shall receive for his services the sum of $500.00 semi-monthly, commencing on the day the delegate is seated and continuing to the final adjournment of the convention or until a vacancy in his seat if a vacancy should sooner occur. No delegate shall receive more than $7,500.00, and each seated delegate shall be entitled to at least $1,000.00 as the constitution provides.