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(1) A fertilizer label shall not bear a statement that connotes or implies that certain plant nutrients contained in the fertilizer are released slowly over a period of time, unless the nutrients are identified and guaranteed in the label or accompanying instructions or directions.

(2) The term “slow release” shall be used to describe fertilizer products that release or convert to a plant-available form their plant nutrients at a slower rate relative to a “reference soluble” product.

(3) Slow-release products include products coated oi occluded, to control the release of soluble nutrients through coating or occlusion of the soluble nutrient compounds.

(4) Water-insoluble or slowly available water-soluble slow release products include

(a) sulphur-coated urea, polymer-coated urea, and other encapsulated soluble fertilizers;

(b) products in which fertilizers are mixed with waxes, resins, or other inert materials and formed into particles; and

(c) ureaform-formaldehyde products.

(5) Water-insoluble products include organic fertilizers, ureaform materials, insobutylidene diurea, and oxainide.

(6) Slowly available water-soluble products include methylenediurea, dimethylenetriurea, and dicyanodiamide.

(7) The term “stabilized” is used to describe fertilizer products that have been modified with an additive that reduces the rate of transformation of fertilizer compounds, resulting in extended time of availability in the sod.

(8) Stabilizing modifiers include nitrification inhibitors, nitrogen stabilizers, or urea inhibitors.

(9) The registration holder shall provide the Fertilizer Regulatory Administrator with a testing programme that substantiates the claims of “slow release” or “stabilizing” characteristics made on the label.

(10) The testing programme shall be conducted by an accredited research institution accepted by the Fertilizer Regulatory Division.

(11) A laboratory procedure acceptable to the Fertilizer Regulatory Division for evaluating the release characteristics of the product shall be provided by the person registered.