3. As regards any strip which is the subject of an agreement–
The farmer shall not apply insecticides except between 31st August in any year and the following 1st January.
The farmer shall not apply herbicides to the strip other than–
Tri–allate, diclofop–methyl, difenzoquat, flamprop–M–isopropylbenzoyl propethyl or fenoxapropethyl;
Glyphosate, provided that it is applied in the pre-harvest period by spot treatment and solely for the control of couch, black bent or onion couch;
Fluroxypyr, provided it is applied by spot treatment and solely for the control of cleavers; or
any other herbicide applied by any method which the Minister may from time to time approve for this purpose.
The farmer may cultivate and apply herbicides to that part of the strip which adjoins a field boundary where it is desirable so to do in order to maintain a sterile area.