Weigh master certificates in use as of December 31, 1984 may be used until which date?

The correct answer indicates that weigh master certificates in use as of December 31, 1984, may be utilized until January 1, 1988. This timeframe allows for a reasonable transition period for weigh masters to comply with new regulations or updates that may have been established after that date. It reflects an understanding of the balance between maintaining operational continuity while also ensuring that standards are met.

This approach supports the enforcement of updated practices or standards without causing undue disruption, allowing those in the industry adequate time to adapt to new requirements. Therefore, the extension until January 1, 1988, emphasizes the importance of gradual implementation rather than an abrupt cut-off, which could complicate weight verification operations for weigh masters who had previously been operating under the older certificates.