What percentage of income must a retailer derive from selling small quantities to require weigh master status?

A retailer must derive 90% of its income from selling small quantities to require weigh master status. This specific percentage is significant because it sets a standard that distinguishes businesses primarily engaged in retail sales using weights and measures from those that operate under different regulatory requirements. The regulation ensures that businesses operating as weigh masters are primarily focused on accurate weight-based transactions, which is critical for maintaining fair trade practices and consumer protection. The 90% threshold ensures that a substantial portion of the retailer's activities involves weight measurement, reinforcing the necessity for compliance with regulations governing weights and measures.