‘1.

The refunds on casein falling within CN code 3501 10, on caseinates falling within CN code 3501 90 90 or, on ovalbumin falling within CN codes 3502 11 90 and 3502 19 90 exported in the unaltered state, may be differentiated according to destination if such is required by:

(a)

the world trade situation in those goods; or

(b)

specific requirements of certain markets.’