§53.14. Modification of a reference or equivalent method. — Inbound Citations

(g) If an applicant modifies an analyzer, PM 10 sampler, PM 2.5 sampler, or PM 10-2.5 sampler that has been designated as a FRM or FEM, the applicant shall not sell the modified analyzer or sampler as a reference or equivalent method nor attach a label or sticker to the modified analyzer or sampler under paragraph (d) or (e) of this section until the applicant has received notice under § 53.14(c) that the existing designation or a new designation will apply to the modified analyzer or sampler or has applied for and received notice under § 53.8(b) of a new FRM or FEM determination for the modified analyzer or sampler.