A lease agreement is a legally binding contract between lessor & lessee which is mostly common in the context of a rental property. The agreement states that the landlord has given this right to the tenant to use his property under specific terms and conditions. Use of non-disclosure agreements are on the rise in India and is governed by the Indian Contract Act 1872. Use of an NDA is crucial in many circumstances, such as to tie in employees who are developing patentable technology if the employer intends to apply for a patent. Non-disclosure agreements have become very important in light of India's burgeoning outsourcing industry. In India, an NDA must be stamped to be a valid enforceable document. Many medical offices will have these non-disclosure agreements for vendors, contractors, students, or other non-employees who work with them. In your article you say this “A non disclosure agreement must specify the date on which it goes into effect. This is generally the date on which the agreement is signed but it can be a different date. The Parties agree that any indebtedness secured against, or attributable to, any item of property that either Party is receiving under this Agreement will be the sole responsibility of the Party receiving the particular property.