Article 53 establishes the timeline for the law's implementation and initial registration. Clause 1 stipulates that the law becomes effective from the beginning of the financial year immediately following its publication date in the Official Gazette. Clause 2 introduces a specific, earlier deadline for registration, creating an exception to the general effective date. It mandates that any person with a legal obligation to register for tax purposes must complete their registration with the Authority. This registration must be finalised within a thirty-day period commencing from the date the law is published, establishing a distinct and early compliance requirement.