Section 4. Treatment of seed

Subject to the provisions of section 7, every owner of seed in any controlled area, whether such seed has been produced in or imported into that area, and every person who has undertaken the ginning of any taw cotton on behalf of another, shall before a date, which shall be prescribed, being not later than seven days after the prescribed date first referred to in section 3, cause such seed to be treated by such method as shall be prescribed : Provided that for the purpose of treatment of seed by exposure to the heat of the sun the date prescribed shall be not earlier than the first day of April and not later than the fifteenth day of May.