Removable or displaceable protective housings [1040.10(g)(6),(7)] that are not safety-interlocked or that have defeatable safety interlocks also require warning labels. The severity of the warning depends on the type and level of the interior laser radiation. Wording is specified; invisible, electromagnetic, and x radiation must also be indicated if present. Labeling must also be visible on the product prior to and during removal or displacement of the housing and close to the opening involved.