Legal requirements of the contract of employment Most employers need a professional and executive employee's agreement contract that protects both the employer and the employee in some cases. As per De Cuyper et al. [2131?], an employment contract may vary by the position an average employment agreement is dependent on: must include terms by the law, rights of employer i.e. line manager to include and factors affecting the contract. An employment agreement contract must include the following legal requirements whether it is specied by the employer or not. As per the Employment Rights Act 1 HI'IE