Used mobile homes require special attention and currently will need to be pre-treatment with heat year around when loaded on vessels bound for Oceania where the biosecurity requirements are strict.
The reason for this is the high possibility that such units have been exposed to the nature for a long period of time and that they offer many hiding places for animal life. Heat treatment is during these conditions the treatment option offering the best result in ensuring that units are free from any kind of animal life. (Gas treatment with Sulfuryl Fluoride (SF) will in some ports be accepted due to the lack of heat treatment capacity.)