Sheep: Withholding Period Between Dipping And Shearing The Countess of Mar asked Her Majesty's Government:Whether it is now a requirement of the British Wool Marketing Board that sheep owners who send fleeces to British Wool Marketing Board depots must guarantee that their sheep have not been dipped in organophosphate sheep dips within six months of shearing. [HL970] Baroness Hayman We understand that the British Wool Marketing Board is supporting recommendations made by the Environment Agency in asking wool producers to observe a three-month withholding period between dipping and shearing in respect of the wool clip for the year 2000. The adequacy of the three-month withholding period will be reviewed during the course of the 2000 marketing year.