Notwithstanding anything contained in paragraph 1, in respect of a motor car or goods (other than the goods specified in the second proviso to that paragraph), imported by a personal and private use, drawback of duty shall be calculated by reducing the import duty paid in respect of such motor car or goods by 4%, 3%, 2 and a half percent and 2% for use for each quarter or part thereof during the period of first year, second year, third year and fourth year respectively.