Nothing in this section shall be construed to prohibit the solicitation or collection of funds and contributions to be used for medical aid and assistance, or for food and clothing to relieve human suffering, when such solicitation or collection of funds and contributions is made on behalf of and for use by any person or organization which is not acting for or on behalf of any such government, but all such solicitations and collections of funds and contributions shall be in accordance with and subject to such rules and regulations as may be prescribed.