(2) When a person has equipped one engine as required by subsection (1) of this section, any additional engines operated by the person within 150 feet of the equipped engine shall be exempt from the requirements of subsection (1) of this section.
(3) For the purposes of this section, an internal combustion engine shall be considered stationary if it is operated for a period of more than two days exclusively at one location in an operation area.
(4) The forester in writing may waive any requirement of this section when an operation will not constitute a fire hazard sufficient to justify the requirement. [Formerly 477.184; 1967 c.429 §19; 1997 c.274 §26]