The following words and phrases when used in this subchapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Business combination transaction." Any merger or consolidation, sale, lease, exchange or other disposition, in one transaction or a series of transactions, whether affecting all or substantially all the property and assets, including its good will, of the business operation that is the subject of the labor contract referred to in section 2587 (relating to labor contracts preserved in business combination transactions) or any transfer of a controlling interest in such business operation.
"Control-share approval." The term shall have the meaning specified in section 2581 (relating to definitions).
"Covered labor contract." Any labor contract if such contract:
(1) covers persons engaged in employment in this Commonwealth;
(2) was negotiated by a labor organization or by a collective bargaining agent or other representative;
(3) relates to a business operation that was owned by the registered corporation (or any subsidiary thereof) at the time of the control-share approval with respect to such corporation; and
(4) was in effect and covered such business operation and such employees at the time of such control-share approval.
"Employee" and "employment in this Commonwealth." The terms shall have the meanings specified in section 2581.
"Subsidiary." The term shall have the meaning specified in section 2552 (relating to definitions).