Duties of Agent to Principal In business matters, the rights and duties of principal and agent are normally set out in a written agency agreement. Additional rights and duties may be implied by law if not contained within the agency agreement. In particular, the Commercial Agents (Council Directive) Regulations 1993, SI 1993/3053 impose specific provisions in respect of commercial agents, which in most cases cannot be excluded by contract. Where commercial agents are concerned, see, also, Practice Notes: Commercial agency and Termination of commercial agency. In relation to the duty to account and pay over, the agent must keep accurate accounts of their dealings on the principal's behalf. Books and documents relating to the agency must be produced on demand and the agent must pay over money held for the principal's use, with interest. Further, all monies received