Clause 42 adds a new drug testing measure to schedule 1 of the TPIM Act 2011. A TPIM subject will be required to submit to drug testing by way of providing a relevant sample. Under the clause, testing is limited to testing for the presence of specified class A and class B drugs. These drugs are the same as the class A and class B drugs specified in the Criminal Justice and Court Services Act 2000. The definition of “permitted sample” sets out an exhaustive list of the non-intimate samples that may be taken, mirroring the definition of “non-intimate sample” in section 65 of the Police and Criminal Evidence Act 1984. Drug testing under the clause may be carried out only by a constable at a police station, but the clause contains a power for the Secretary of State to make regulations prescribing additional or alternative testers and places of testing.