The purpose of this guide is to inform a wide range of professionals working with children and families about confidentiality and privilege laws. However, unlike with non-compete agreements in Massachusetts, there is no legal requirement that there be a time limit for non-disclosure agreements.Generally, confidentiality agreements are enforceable when they meet the general requirements of a contract. A Confidentiality Agreement can stop current and former employees from disclosing and using your confidential information for another business! Definition: A Perpetual NDA has no expiry date, meaning that the obligations of confidentiality continue indefinitely. Confidentiality agreements are very useful to prevent unauthorized disclosures of information, but they have inherent limitations and risks.