What is sifting? The Retained EU Law (Revocation and Reform) Act 2023 (REUL(RR)A 2023) contains a range of legislative powers, enabling relevant national authorities to reform retained EU law (REUL) by introducing secondary legislation to amend, revoke, restate and/or replace REUL and assimilated law. Under REUL(RR)A 2023, before certain statutory instruments (described here as ‘REUL reform SIs’) are formally laid in Parliament, they have to go through a preliminary sifting process to confirm the appropriate parliamentary procedure. The recommendations of the sifting committees are set out in regular reports. If either committee recommends that a proposed negative SI should be upgraded to the affirmative procedure, the government may accept the recommendation or reject it. In the latter case, the minister responsible must provide an explanation, but may still proceed with the SI under the negative procedure. This Q&A explains the sifting process under REUL(RR)A 2023 in a little more detail. Note: specific requirements and scrutiny procedures apply for SIs introduced by, or jointly with,