Tonnage Tax Scheme application and computation rules prescribe forms, deemed tonnage conversion, incidental activities, and audit reporting. Application to opt for, or renew the option for, the Tonnage Tax Scheme is to be made in Form No. 80 and verified as specified in the form. Deemed tonnage for purchase of slots, slot charter, and sharing of a break-bulk vessel is to be computed on the prescribed conversion basis. The rule also specifies incidental activities, the method for computing charter-in limits for qualifying ships, and requires the audit report of a qualified company to be furnished in Form No. 81.