4.—(1) Where any sludge or septic tank sludge has been used on agricultural land, no person shall cause or knowingly permit the activities specified in column (1) of the Table below to be carried out on that land before the expiry of the period specified in column (2) thereof.
| (1) | (2) |
|---|---|
| Activity | Period |
| Grazing animals or harvesting forage crops | Three weeks commencing on the date of the use |
| Harvesting fruit and vegetable crops which are grown in direct contact with the soil and normally eaten raw | Ten months commencing on the date of the use |
(2) Where any untreated sludge has been used on land without being injected into the soil, the occupier of the land affected shall, as soon as reasonably practicable thereafter, cause such sludge to be worked into the soil of the land affected.