has been used as well. In these circumstances, one code has been used for tickets issued against the "original" Railcard, and the other has been used for those issued with the "new" version. CHFAM was used exclusively again once all of the "original" Railcards had expired. This happened after both the 1990 and the 2000 changes to the Railcard conditions. Definition of child fares For ticket-issuing purposes, British Rail defined a child as being between five years old and one day short of 16 years old. This definition has been maintained since privatisation. Children under five are allowed free travel, provided that they do not occupy reserved seats and that no more than two (in British Rail days, four) accompany each fare-paying adult. The sole exception to this occurs with the Family Railcard: if a Railcard holder is travelling with one or more children under the age of five, and the combination of Railcard-discounted adult fare plus Railcard-discounted child fare(s) is cheaper than the full (non-discounted) adult fare, the Railcard holder may buy discounted tickets for the group, as if the children were actually five or older. Where children turn 16 during the validity of a Railcard, they may still travel at the child fare until it expires. Applications Railcards can be bought at railway station ticket offices; Rail Appointed Travel Agencies; by post from an agency at Harrington Dock, Liverpool (this option was available by 1993, and possibly earlier; the agency was originally set up in 1989 for Senior Railcards); through train operating company telesales facilities; and online at a website accessed via ATOC's "Railcards" website. Railcards bought online are sent by post. Price The price of the Railcard has increased over time: As from 1 February 1981, dedicated joint-holder railcards were withdrawn; and either one or two names could be shown on a railcard, with no price difference. Popularity In 2000, approximately 300,000 Railcards were in use. 2.9 million journeys using the Railcard were made per year at that stage. Notes Form numbers are codes introduced by British Rail to classify and catalogue all printed material: documents, tickets, wage slips, notepaper, parcels labels and hundreds of other items. Form numbers consist of a primary code and, often, a sub-code, separated by /. APTIS tickets used primary code 4599 in British Rail days; this changed to 7599 on post-privatisation "RSP" tickets. Other primary codes have since been introduced on