Section 13 of the Principal Act is amended as follows:

(a) by omitting from subsection (1) ", through their involvement with the handling of dangerous substances or with handling systems at any place, may affect the safety of any person or harm any property or the environment" and substituting "handle dangerous substances" ;

(b) by omitting from subsection (2)(b) "or other person" ;

(c) by omitting from subsection (2)(e) "DSL." and substituting "DSL;" ;

(d) by inserting the following paragraph after paragraph (e) in subsection (2) :

(f) a person that alters or maintains a handling system at an MHF or DSL.