§ 501 Collection and publication; facts required; deteriorated tobacco
§ 502 Standards for classification; returns and blanks
§ 503 Reports; necessity; by whom made; penalties
§ 504 “Person” defined
§ 505 Access to internal-revenue records
§ 506 Returns under oath; administration
§ 507 Limitation on use of statistical information
§ 508 Separability