Paragraph 11
A licensee must only irradiate food with—
(a)
gamma rays from the radionuclide 60Co;
(b)
gamma rays from the radionuclide 137Cs;
(c)
X-rays generated from machine sources operated at or below an energy level of 5 MeV; or
(d)
electrons generated from machine sources operated at or below an energy level of 10 MeV.