The term promotion means any action, including paid advertising, to advance the image and desirability of concrete masonry products with the express intent of improving the competitive position and stimulating sales of concrete masonry products in the marketplace. (17) Research The term research means studies testing the effectiveness of market development and promotion efforts, studies relating to the improvement of concrete masonry products and new product development, and studies documenting the performance of concrete masonry. (18) Secretary The term Secretary means the Secretary of Commerce. (19) United States The term United States means the several States and the District of Columbia. 4. Issuance of orders (a) In general (1) Issuance The Secretary, subject to the procedures provided in subsection (b) , shall issue orders under this Act applicable to manufacturers of concrete masonry products. (2) Scope Any order shall be national in scope. (3) One order Not more than one order shall be in effect at any one time. (b) Procedures (1) Development or receipt of proposed order A proposed order with respect to the generic research, education, and promotion with regards to concrete masonry products may be— (A) proposed by the Secretary at any time