((a)) ** Publication** Within 90 days after the date of issuance of any interpretive ruling (including any ruling letter, or internal advice memorandum) or protest review decision under this chapter with respect to any customs transaction, the Secretary shall have such ruling or decision published in the Customs Bulletin or shall otherwise make such ruling or decision available for public inspection.
((b)) ** Appeals** A person may appeal an adverse interpretive ruling and any interpretation of any regulation prescribed to implement such ruling to a higher level of authority within the Customs Service for de novo review. Upon a reasonable showing of business necessity, any such appeal shall be considered and decided no later than 60 days following the date on which the appeal is filed. The Secretary shall issue regulations to implement this subsection.
((c)) ** Modification and revocation** A proposed interpretive ruling or decision which would—
((1)) modify (other than to correct a clerical error) or revoke a prior interpretive ruling or decision which has been in effect for at least 60 days; or
((2)) have the effect of modifying the treatment previously accorded by the Customs Service to substantially identical transactions;
((d)) ** Publication of customs decisions that limit court decisions** A decision that proposes to limit the application of a court decision shall be published in the Customs Bulletin together with notice of opportunity for public comment thereon prior to a final decision.
((e)) ** Public information** The Secretary may make available in writing or through electronic media, in an efficient, comprehensive and timely manner, all information, including directives, memoranda, electronic messages and telexes which contain instructions, requirements, methods or advice necessary for importers and exporters to comply with the Customs laws and regulations. All information which may be made available pursuant to this subsection shall be subject to any exemption from disclosure provided by .1section 552 of title 5