Article 56 establishes the mandatory record-keeping requirements under the Corporate Tax Law. It specifies that both Taxable Persons and Exempt Persons must maintain all relevant records and documents for a period of seven years following the end of the tax period to which they relate. For Taxable Persons, these records must substantiate the information filed in Tax Returns and enable the Authority to readily ascertain their Taxable Income. For Exempt Persons, the records must be sufficient to allow the Authority to verify their exempt status. This rule applies notwithstanding any other provisions in the Tax Procedures Law.