Home › CFR › Title 21 › Part 10021 CFR Part 100 — GeneralSubpart A — State and Local Requirements§ 100.1— Petitions requesting exemption from preemption for State or local requirements.§ 100.2— State enforcement of Federal regulations.Subpart F — Misbranding for Reasons Other Than Labeling§ 100.100— Misleading containers.Subpart G — Specific Administrative Rulings and Decisions§ 100.155— Salt and iodized salt.