§ 1903.6 Advance notice of inspections.
(a) Advance notice of inspections may not be given, except in the following situations:
(1) In cases of apparent imminent danger, to enable the employer to abate the danger as quickly as possible;
(2) In circumstances where the inspection can most effectively be conducted after regular business hours or where special preparations are necessary for an inspection;
(3) Where necessary to assure the presence of representatives of the employer and employees or the appropriate personnel needed to aid in the inspection; and
(4) In other circumstances where the Area Director determines that the giving of advance notice would enhance the probability of an effective and thorough inspection.