Sec. 5. A foreign entity registered under this chapter is entitled to sell precious metals bullion and currency at a trade fair or coin show in Indiana during the term of the temporary registration if the contract:
(1) is for the purchase of precious metals bullion or currency;
(2) requires physical delivery of the quantity of the precious metals bullion or currency purchased not later than twenty-eight (28) calendar days after payment in full of the purchase price; and
(3) provides for the purchaser to receive physical delivery of the quantity of precious metals bullion or currency purchased not later than twenty-eight (28) calendar days after payment in full of the purchase price.