ORDER
For the reasons set forth in the attached memorandum, petitioner’s motion for emergency relief is granted. That portion of ER-1245A that revokes the “unreasonably burdened” language is vacated.
We further order the CAB to republish the “unreasonably burdened” provision of ER-1091 until such time as those provisions may be amended or revoked by proper rule-making made after new notice and comment proceedings in compliance with the requirements of section 4(b), (c) of the Administrative Procedure Act, 5 U.S.C. § 553(b), (c) (1976).
Memorandum
On January 28, 1983, this court entered its opinion in
Action on Smoking and Health [ASH] v. Civil Aeronautics Board,
As a result, the opinion clearly and unequivocally
vacated
the offending portion of ER-1245. To “vacate,” as the parties should well know, means “to annul; to cancel or rescind; to declare, to make, or to render, void; to defeat; to deprive of force; to make of no authority or validity; to set aside.” 91 C.J.S.
Vacate
(1955);
see Stewart v. Oneal,
*798 Because the effect of this court’s judgment in ASH v. CAB was to reinstate the protections of ER-1091, they cannot again be revoked without new rulemaking in accordance with the provisions of section 4 of the Administrative Procedure Act. See 5 U.S.C. § 553 (1976). The APA requires agencies engaging in rulemaking to publish notice of the proposed rule and rulemaking proceedings in the Federal Register and to afford all interested persons an opportunity to participate in the rulemaking process. See id. at § 553(b), (c). Despite this requirement, CAB, without providing new opportunities for notice and comment, has elected to publish a “new” rule, again revoking one of the protections accorded by ER-1091. See Smoking Aboard Aircraft, 48 Fed.Reg. 24,866 (1983) (to be codified at 14 C.F.R. pt. 252) (adopted May 19, 1983; effective July 3, 1983). This “new” rule purports to provide, in response to this court’s decision in ASH, “further explanation for its earlier decision ... not to include vague language in its smoking rule prohibiting unreasonable burdens on nonsmokers from breathing tobacco smoke.” Id. at 24,866.
CAB attempts to justify its refusal to engage in renewed notice and comment procedures by arguing that, because the court invalidated ER-1245 due to its inadequate explanation of basis and purpose, further explanation, as provided in the “new” rule, should be all that is necessary to remedy the earlier deficiency.
See
CAB Order No. 83-5-101 (May 19,1983). In support of this argument, CAB relies heavily upon the language of
Williams v. Washington Metropolitan Area Transit Comm’n,
[Wjhere an agency action must be set aside as invalid, but the agency is still legally free to pursue a valid course of action, a reviewing court will ordinarily remand to enable the agency to enter a new order after remedying the defects that vitiated the original action.
However, Williams does not address the steps an agency must take to enter a valid new order to remedy defects in an earlier vacated action. 2 An agency *799 cannot remedy a deficiency in one regulation by promulgating a new rule, equally defective for the same 3 or other reasons.
This court did not remand the invalid portion of ER-1245 to the CAB for further explanation or for any other agency action. Our failure to do so was no accident. The Administrative Procedure Act requires the agency to
“incorporate in the rules adopted
a concise general statement of their basis and purpose.”
See
5 U.S.C. § 553(c) (1976) (emphasis supplied). This language contemplates that the basis and purpose statement will
accompany
publication of a rule,
see American Standard, Inc. v. United States,
Although, as this court has previously noted, a basis and purpose statement need not be published “at precisely the same moment as the regulations,”
see Tabor,
In a transparent attempt to circumvent the problem of post hoc rationalization, the CAB purports to promulgate a “new” rule, ER-1245A, supplying the statement of basis and purpose that ER-1245 lacked and revoking one of the same provisions that ER-1245 attempted unsuccessfully to revoke. See 48 Fed.Reg. at 24,866. However, the CAB has not conducted a new notice and comment rulemaking proceeding but has chosen instead to rely on the record developed with respect to the old rule, ER-1245. See CAB Order No. 83-5-101 (May 19, 1983).
*800 The agency cannot have its proverbial cake and eat it too. If ER-1245A does nothing more than to supply the explanation of basis and purpose absent in ER-1245, then ER-1245A is invalid as a post hoe rationalization. If, on the other hand, ER-1245A is in fact a new rule, then it must be promulgated in accordance with the rulemaking procedures demanded by section 4 of the Administrative Procedure Act, including its notice and comment requirements. See 5 U.S.C. § 553(b), (c) (1976).
Although the Administrative Procedure Act does not establish a “useful life” for a notice and comment record, clearly the life of such a record is not infinite. By the CAB’s own admission, adoption of ER-1245 “was the
culmination
of a rulemaking proceeding that began in 1976 .... ” 48 Fed. .Reg. at 24,866. If one rulemaking proceeding has culminated and another has begun, then new notice and comment procedures are required.
4
See Rodway v. United States Dep’t of Agriculture,
We do not hold that an agency must start from scratch in every situation in which rules are vacated or remanded due to the absence or inadequacy of their statement of basis and purpose. An exception is provided by the Administrative Procedure Act itself “when the agency for good cause finds (and incorporates the finding and a brief statement of reasons therefor in the rules issued) that notice and public procedure thereon are impracticable, unnecessary, or contrary to the public interest.” 5 U.S.C. § 553(b)(B) (1976). However, this exception does not apply to the present case.
First, ER-1245A contains not a single word of explanation as to why new notice and comment proceedings are impracticable, unnecessary, or contrary to the public interest.
See
48 Fed.Reg. 24,866 (1983). CAB Order No. 83-5-101 (May 19, 1983) contains an extended discussion of CAB’s reasons for believing it is not legally required to engage in new rulemaking proceedings. However, even if a separate order satisfied the requirements of the section 4(c) exception (and it does not), the only language that suggests a
reason
for a determination that notice and comment is
unnecessary
is the Board’s observation that “the applicable notice of proposed rulemaking and record are still outstanding .... Where we have decided to explain and affirm our earlier decisions ... it is because we are satisfied with the present record and doubt that further comments would produce any additional light.”
Id.
at 2-3. CAB may not avoid the notice and comment requirements of section 4 simply because the Board questions the utility of those requirements. This court has repeatedly held that exceptions to the notice and comment requirements will be narrowly construed and only reluctantly countenanced.
See, e.g., American Federation of Gov’t Emp. v. Block,
Second, a finding of good cause for waiver of the notice and comment requirements cannot be supported under the facts of this case. Notice and comment are clearly not impracticable. The CAB is providing a comment period with respect to its renewed proposals to revoke two other protections, requiring special segregation of cigar and pipe smokers and a ban on smoking when aircraft ventilation systems are not fully functioning, which the agency attempted to revoke in ER-1245. See 48 Fed.Reg. at 24,868. The agency could readily incorporate a proposal to revoke the “unreasonably burdened” language in the same notice and comment proceedings. Nor does the mere presence of a prior notice and comment record on the smoking regulations render the solicitation of new comments unnecessary. The comments solicited under ER-1245 are now between two and four years old.
5
It cannot be presumed that no new evidence relevant to the problem of drifting smoke on aircraft could have developed in that interim. Indeed, CAB’s new statement of basis and purpose relies in part on such data — the level of complaints received during the period in which the regulation was eliminated.
See
48 Fed.Reg. at 24,867. Although the agency is entitled to look outside the record in formulating rules and to draw upon its own regulatory experience and expertise,
see Pacific Coast European Conference
v.
United States,
Finally, the CAB’s conclusion that the “unreasonably burdened” language “merely serves to create confusion over exactly, which airline practices are prohibited,” 48 Fed.Reg. at 24,867;
see also
CAB Order No. 83-5-101 at 4 (May 19, 1983), does not suffice to demonstrate that the opportunity for notice and comment would be contrary to the public interest,
see
Respondent’s Opposition to Motion for Emergency Relief and Stay at 26 (June 27,1983). The public interest exception to notice and
*802
comment requirements contemplates real harm to the public, not mere inconvenience to the agency.
See United States Steel Gorp. v. EPA,
Conclusion
For the reasons described above, we find that the promulgation of ER-1245A failed to comply with the procedural requirements of section 4 of the Administrative Procedure Act. We cannot dispute the CAB’s contention that this court’s “role is not to substitute its judgment for that of the Board” on the merits of its smoking rules. Respondent’s Opposition to Motion for Emergency Relief and Stay at 15 (June 27, 1983);.
see Citizens to Preserve Overton Park v. Volpe,
Notes
. To summarize briefly the factual background which is set out in greater detail in this court’s previous opinion in this action,
In 1979, CAB promulgated ER-1091 providing three new protections for nonsmokers. The first two of these provisions required special segregation of cigar and pipe smokers and prohibited all smoking when ventilation systems are not fully functioning. The third, at issue in this case, specified that:
Carriers shall ensure that non-smoking passengers are not unreasonably burdened by breathing smoke and to that end shall provide at a minimum:
******
(e) Special provisions to ensure that if a no-smoking section is placed between smoking sections, the non-smoking passengers are not unreasonably burdened.
14 C.F.R. § 252.2(e) (1981).
On September 2,1981, the CAB adopted ER-1245, revoking these three protections. In
ASH,
we found that ER-1245 had been improperly promulgated due to its lack of an adequate statement of basis and purpose; therefore, we vacated that portion of ER-1245 that attempted to revoke the protections afforded by ER-1091.
See
At a meeting on April 20, 1983, the Board adopted staff proposals again revoking all three provisions without reopening notice and comment proceedings. See CAB Case Mem. No. 069J (April 15, 1983) (not yet published or • effective). In response to a request by ASH for a stay of that decision, the Board decided to retain in force the cigar and pipe and ventilation requirements, pending notice and comment on renewed proposals to revoke these provisions. See CAB Order No. 83-5-101 at 2-3 (May 19, 1983). In the same order, however, the Board again decided to revoke the “unreasonably burdened” language without new notice and comment. See id. at 3-4. Pursuant to that decision, the Board adopted and published ER-1245A revoking the “unreasonably burdened” language without new notice and comment and republishing the cigar and pipe and ventilation requirements pending further agency action. See Smoking Aboard Aircraft, 48 Fed.Reg. 24,866, 24,867-88 (1983) (effective July 3, 1983) (to be codified at 14 C.F.R. pt. 252). In this action, ASH seeks emergency relief staying the effect of ER-1245A with respect to the revocation of the “unreasonably burdened” language.
. Indeed, among the complaints of petitioners in
Williams
was the charge that the agency had entered its new order “without any notice or hearing specifically related to that purpose.”
The other authorities upon which the CAB relies are equally inapposite.
City of Cleveland v. FPC,
Camp v. Pitts,
palpably inadequate. The agency offers no reasoning to support its conclusion that the matters covered by the rescinded provisions are better “left to carrier discretion.” We are told that the decision was made “[a]fter considering the outstanding proposals,” yet no evidence of that consideration is given. To accept the Board’s action would render judicial review of informal rules meaningless.
. ASH argues that the basis and purpose statement of the “new” rule still provides insufficient explanation of the agency’s decision and reflects inadequate consideration of alternatives to revocation of the original rule. See Petitioner’s Motion for Emergency Relief at 24-29, 31-33 (June 17, 1983). Because of our disposition of this motion on other procedural grounds, we do not reach the merits of the CAB’s new explanation of the basis and purpose of the revocation.
. As the agency itself acknowledges, “[o]ne notice for each decision is all that is required by the APA.” Respondent’s Opposition to Motion for Emergency Relief and Stay at 12 (June 27, 1983). If ER-1245A is truly a new decision, then new notice and comment are required.
. CAB suggests that the “unreasonably burdened” language was initially intended to deal with the problem of “sandwiching” nonsmoking sections between two or more smoking sections. See Respondent’s Opposition to Motion for Emergency Relief and Stay at 16 (June 27, 1983). The comment period for EDR-377, proposing amendment of EDR-1091 to deal with “sandwiching” closed on September 19, 1979. See 44 Fed.Reg. 29,486 (1979). Comments for a broader proposal, EDR--420, which suggested the alternatives of totally banning smoking on airplanes or totally eliminating CAB regulation of smoking, were due by April 13, 1981. See 46 Fed.Reg. 11,827 (1981).
. The fact that ASH may have had other opportunities to bring some or all of this information to the attention of the Board is of minimal relevance since the onus is on the Board to establish that notice and comment is unnecessary.
See Joseph v. United States Civil Serv. Comm’n,
