At Silver Dream Factory we have a "no open-toe shoe" policy.  Even crew/staff members are in an area of foot-injury danger and on a limited basis, the footwear-protection rules applies. Wearing footwear such as open-toed shoes/sandals,flip-flops, huaraches, in an office does not violate OSHA rules. However, if an office crew/staff must enter a stage or work area (stage/set(s)/Backlot where the danger of foot injury is present, open-toed shoes/shoes/sandals,flip-flops, huaraches, would not be adequate protection and appropriate footwear protection is required.