(a) By December 31, 2000, all contract feed that is fed to chickens must include phytase or other enzyme or additive that reduces phosphorus in poultry waste to the maximum extent that is commercially and biologically feasible.

(b) Subject to the provisions of subsection (a) of this section, the Secretary shall adopt regulations to monitor compliance with subsection (a) of this section.

(c) If the Secretary determines that the requirements set forth in subsection (a) of this section have a significant detrimental effect on poultry production or the poultry market, the Secretary shall:

(d) In developing regulations under subsection (b) of this section and in making a determination under subsection (c) of this section, the Secretary shall consult with the Delmarva poultry industry, the Maryland Farm Bureau, and the University of Maryland Department of Animal and Avian Science.