; (2) funds available to the Department of Defense for the procurement of defense equipment are not expended in connection with the transfer; (3) the President determines that the transfer of such articles will not have an adverse impact on the military readiness of the United States; (4) with respect to a proposed transfer of such articles on a grant basis, the President determines that the transfer is preferable to a transfer on a sales basis, after taking into account the potential proceeds from, and likelihood of, such sales, and the comparative foreign policy benefits that may accrue to the United States as the result of a transfer on either a grant or sales basis