Varying the use of an agricultural or veterinary chemical product to include a new use is also known as an ‘extension of use’. This variation is made via:

An application to vary a withholding period and/or export interval statement must contain sufficient information to demonstrate that the proposed label changes will:

(i) not result in an exceedance of established maximum residue limits (MRLs), or
(ii) support any proposed changes to MRLs.

The product, once varied as proposed, must continue to meet the safety (section 5A), efficacy (section 5B) and trade (section 5C) criteria.