Development rebate expansion: used ships and imported plant may qualify for deduction subject to prescribed conditions and business use. Amendment inserts a provision allowing a development rebate deduction where an assessee acquires a ship previously used by another person or installs machinery or plant previously used outside India, subject to conditions: non-previous Indian ownership/use, importation by the assessee for plant, no prior allowance for depreciation or rebate, whole business use, and any prescribed conditions; the rebate is allowable in the year of acquisition or installation or, if first put to use in the next year, in that year.