If a training allowance under any Federal law other than this chapter is paid to an adversely affected worker for any week of unemployment with respect to which he would be entitled (determined without regard to any disqualification under section
2291
(b) of this title) to a trade readjustment allowance if he applied for such allowance, each such week shall be deducted from the total number of weeks of trade readjustment allowance otherwise payable to him under section
2293
(a) of this title when he applies for a trade readjustment allowance and is determined to be entitled to such allowance. If such training allowance paid to such worker for any week of unemployment is less than the amount of the trade readjustment allowance to which he would be entitled if he applied for such allowance, he shall receive, when he applies for a trade readjustment allowance and is determined to be entitled to such allowance, a trade readjustment allowance for such week equal to such difference.