<h1>Budget secrecy upheld through official lock-in and controlled printing protocols ensuring confidentiality until formal presentation.</h1> The printing of Union Budget documents is conducted under strict confidentiality through a formal 'lock-in' at the Budget Press, preventing officials from contacting outsiders until the Finance Minister's budget speech. The Budget Division of the Department of Economic Affairs issues an Annual Budget Circular prescribing the form and content of Budget Estimates and instructions to ministries; these procedural and secrecy measures support the controlled preparation and printing of the Union Budget.