Why the disposal stream is handled separately
The contents of a sanitary disposal unit are a regulated waste stream requiring appropriate handling, containment, transport and disposal. Hygiene service providers operate under that framework with trained staff, sealed exchange units and documentation showing when each unit was serviced. A cleaner emptying one into general waste creates a compliance and health problem regardless of intent. Attempting to shortcut it also exposes the person doing it to a genuine health risk that the licensed arrangement is designed to avoid.
The unit itself is usually owned by the hygiene provider under a rental or service arrangement rather than by the site. That means the unit is exchanged rather than emptied on site, which is a different operation entirely. It also means the site cannot simply ask the cleaner to take over, because the equipment belongs to somebody else. Interfering with hired equipment also raises a question about liability if the unit is damaged, which is a further reason the exclusion is absolute.
