For the traveler who likes to carry cash rather than bank cards or traveler’s checks, a new law taking effect Jan. 16 offers an incentive to count your money: all foreign currency in excess of $1,500 must be declared upon arrival. There is no restriction on how much money can be brought in, but only $1,500 in foreign currency will be allowed to be taken out unless it has been declared upon arrival or is accompanied by a special bank receipt.