Code of Federal Regulations Title 30. Mineral Resources § 30.57.19050 Bucket requirements

(a) Be securely attached to a crosshead when traveling in either direction between the lower and upper crosshead parking locations;

(b) Have overhead protection when the shaft depth exceeds 50 feet;

(c) Have sufficient depth or a suitably designed platform to transport persons safely in a standing position;  and

(d) Have devices to prevent accidental dumping where the bucket is supported by a bail attached to its lower half.