66 S T A T. ]
PUBLIC LAW 552-JULY 16, 1952
701
the filing of applicant's request and of the time and place of the hearing thereon as fixed by the Board. "(e) The Board shall not be bound by any previous findings of fact Evidence, by the respondent or by any other representative of the Bureau. Evidence relating to the making of the order complained of and relating to the questions raised by the allegations of the pleadings or other questions pertinent in the proceeding may be offered by both parties to the proceeding. If the respondent claims that danger or a violation of section 209, as set out in such order, existed at the time of the filing of the application, or that methane has been ignited or found in such mine as set out in the order under review, the burden of proving the then existence of such danger or violation, or that methane has been ignited or found in such mine as set out in the order under review, shall be upon the respondent, and the respondent shall present his evidence first to prove the then existence of such danger or violation. Following presentation of respondent's evidence the applicant may present his evideiice, and thereupon respondent may present evidence to rebut the applicant's evidence. "(f) If the proceeding is one in which an operator seeks annulment ^^J^ dings of or revision of an order made pursuant to section 203(a), the Board, upon conclusion of the hearing, shall find whether or not danger throughout the area of such mine as set out in such order existed at the time of the filing of the operator's application. If the Board finds that such danger did not then exist throughout such area of such mine, the Board shall make an order, consistent with its findings, revising or annulling the order under review. If the Board finds that such danger did then exist throughout such area of such mine, the Board shall make an order denying such application. " (g) If the proceeding is one in which an operator seeks annulment or revision of an order made pursuant to section 203(c), the Board, upon conclusion of the hearing, shall find whether or not there was a violation of section 209 as described in such order, at the time of the making of such order. If the Board finds there was no such violation, the Board shall make an order annulling the order under review. If the Board finds there was such a violation, the Board T shall also find whether or not such violation was totally abated at the time of the filing of the operator's application. If the Board finds that such violation was totally abated at such time, the Board shall make an order annulling the order under review. If the Board finds that such violation was not totally abated at such time, the Board shall find whether or not the period of time within which such violation should be totally abated, fixed under section 203 or 206, should be extended. If the Board finds that such period of time should be extended, the Board shall also find what a reasonable extension of such period of time would be, and shall immediately also find the extent of the area of such mine which was affected by such violation at the time of the filing of such application and the Board shall then ? make an order, consistent with its findings, revising the order under review. If the Board finds that such violation was not totally abated at the time of the filing of the operator's application, and that such period of time should not be extended, the Board shall find the extent of the area of such mine which was affected by such violation at such time, and shall make an order, consistent with its findings, affirming or revising the order under review. ,s c " (h) If the proceeding is one in which an operator seeks annulment of an order made pursuant to section 203(d) or 206 (c), the Board, upon conclusion of the hearing, shall find whether or not methane has been ignited in such mine or was found in such mine in an amount of 0.25 per centum or more in any open workings of such mine when
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