This Practice Note focuses on flexible apportionment arrangements (FAA) and in particular the requirements prescribed by the Occupational Pension Schemes (Employer Debt) Regulations 2005 SI 2005/678, reg 6E. This Practice Note also considers timing issues relating to flexible apportionments, the funding test to satisfy, ways in which flexible apportionments differ from scheme apportionments and issues relating to scheme rules, trustee costs, notifiable events and clearance.