While judges apply rules to contracts that work in the favor of employers, an employer"s. Introduction right to manage employees doesn"t extend so far that it gives the employer the right to unilaterally make a contract modification. Contract modification: a change to one or more terms of the contract during the term of the contract. Modification of employment contracts: the employment contract includes a clause describing the process for contract modification. The employer and employee must comply with the specified rules for contract modification: the employment contract doesn"t include a clause describing the process for contract modification. No action required: both employer and employee agree to the modification. Both sides must receive new consideration as a result of the modification: the employer and employee don"t both agree to the modification. The original contract must by terminated in its entirety by provision of the amount of notice required by the contract.