(1)  A reactive phosphate rock fertilizer is to –

(a) be derived only from naturally occurring deposits of calcium phosphate; and

(b) contain at least 12% phosphorus.

(2)  A reactive phosphate rock fertilizer that is not highly reactive or moderately reactive is not to be sold.

(3)  A highly reactive phosphate rock fertilizer is to contain at least 65% total phosphorus soluble in 2% formic acid.

(4)  A moderately reactive phosphate rock fertilizer is to contain between 50% and 65% total phosphorus soluble in 2% formic acid.

(5)  A sample of reactive phosphate rock fertilizer is not to be ground before testing its solubility in 2% formic acid.