definiens: means ( a ) a Reportable Event with respect to a Pen sion Plan, ( b ) the withdrawal of the Company or any ERISA Affiliate from a Pension Plan subject to Section 4063 of ERISA during a plan year in which such entity was a as defined in Section 4001(a)(2 ) of ERISA or a cessation of operat ions that is treated as such a withdrawal under Section 4062(e ) of ERISA, ( c ) a complete or partial withdrawal ( within the meaning of Sections 4203 and 4205 of ERISA ) by the Company or any ERISA Affiliate from a Multiemployer Plan, ( d ) the filing by the pl an administrator of a notice of intent to terminate a Pension Plan or the treatment of a Pension Plan amendment as a termination under Sections 4041 of ERISA, ( e ) the institution by the PBGC of proceedings under Section 4042 of ERISA to terminate a Pension Plan, ( f ) the determination that any Multiemployer Plan is considered an at -risk plan or a plan in endangered or critical status within the meaning of Section 432 of the Internal Revenue Code or Section 305 of ERISA or is insolvent, within the meaning of Section 4245 of ERISA, or has been terminated, within the meaning of Section 4041A of ERISA, ( g ) the determination that any Pension Plan is at at -risk status within the meaning of Section 303 of ERISA, or ( h ) the imposition of any liability pursuant to Sec tions 4062(e ) or 4069 of ERISA or by reason of the application of Section 4212(c ) of ERISA upon the Company or any ERISA Affiliate