The purpose of the Pensions Regulator (Notifiable Events) Regulations 2005 (Notifiable Events Regulations), SI 2005/900, is to give the Pensions Regulator advance warning of events which could cause a scheme, or part of it, to enter an assessment period for the Pension Protection Fund (PPF). The definition of employer is extended for PPF purposes and assessment periods can be triggered in relation to former employers. For example, the Occupational Pension Schemes (Miscellaneous Amendments) Regulations 2005 (OPS(MA)R 2005), SI 2005/2113, reg 5(3) extends the definition in the Pension