Ships, regardless of date of build, as follows: (1) passenger ships including passenger high-speed craft; (2) oil tankers, chemical tankers, gas carriers and cargo high-speed craft of 500 GT and upwards; and (3) other cargo ships and mobile offshore drilling units (MODUs) of 500 GT and upwards. (Reg. IX/2. 1) (Note: Under SOLAS regulation I/1(a), regulation IX/2.1 applies only to ships on international voyages.)