In response to “the current state of the U.S. economy,” Signature Flight Support is levying a new “infrastructure fee” on its customers. The non-waivable per-visit surcharge is–according to a company spokesman–“to assist in recovering expenses for upgrades to facilities, security, insurance increases and other fees charged to Signature to maintain standards for service, safety and security for our customers, crews, passengers and aircraft.” The fee is waived for Signature-based customers departing their home facility and for charity flights.