Custodian obligations require secure expandable facilities, insurance, bonds and liability for lost or transshipped goods. Custodians must provide secure, expandable premises and essential amenities, insure goods, arrange approved security, bear costs for Customs staff, and execute bonds supported by bank guarantees or equivalent to cover goods' value and duty exposure; they are liable for loss, pilferage and transshipment losses, must obtain Commissioner concurrence for structural alterations and subletting, and appointments are for a fixed initial term subject to review and termination by the Commissioner.