The legislation governing each of CSOP, SIP and SAYE uses a definition of ‘constituent company’ that includes any other company to which the plan is expressed to extend where that company is controlled by a parent company (Income Tax (Earnings and Pensions) Act 2003 (ITEPA 2003), Schedule 2 Part 1, paragraph 4(3); ITEPA 2003, Sch 3 Pt 1, para 3(3); ITEPA 2003, Sch 4 Pt 1, para 3(3). All three also define a company as meaning a body corporate (ITEPA 2003, Sch 2 Pt 11, para 99; ITEPA 2003, Sch 3 Pt 9, para 48; ITEPA 2003, Sch 4 Pt 8, para 36). The Limited Liability Partnerships Act 2000 (LLPA 2000)