teacher training, either pre-service or in service, may join IfL with an Affiliate grade of membership. Those who are part-qualified or who hold full qualifications in teaching or assessment at level 3/4 may hold an Associate grade of membership. Those with a full teaching qualification at level 5 or above (or at level 4 if qualified between September 2001 to September 2007 under the 2001 regulations) may progress to full Member grade of membership. Following extensive experience in further education teaching and the achievement of a higher degree (at Masters or Doctoral level) members become eligible for Fellow grade of membership. Associates (AIfL), Members (MIfL) and Fellows (FIfL) are entitled to use post-nominal letters in recognition of their professional status. In addition to the four categories of membership available to further education teaching or training professionals, the Companion grade of membership is open to those with an active interest in teaching or training but who are not themselves teaching or training professionals, for example HR professionals; leaders and managers who do not have teaching or training backgrounds and those working in further education support roles. Companion membership is not recognised through the conferral of post-nominal letters. Conditions of IfL Membership IfL publishes Conditions of Membership describing the individual relationship between members and the professional body. Revised conditions of membership came into effect on 1 October 2012 for the membership period through to 31 March 2013 (1 year membership) or 31 March 2014 (2 year membership). The conditions of membership make it clear that: "Companions, Affiliates, Associates, Members and Fellows, referred to throughout the conditions of membership as ‘members’, are members of IfL, the professional body for teachers and trainers and not members as defined by the Companies Act unless otherwise elected to IfL's Advisory Council." Work of the IfL Professional formation (QTLS and ATLS) IfL members are not required to achieve QTLS or ATLS, for which there is a charge of £485 (see below), but are encouraged to do so by IfL (who set, collect and administer payment as well as being the sole awarding body) as a demonstration of the currency of their teaching practice. Professional formation Qualified Teacher Learning and Skills (QTLS) and Associate Teacher Learning & Skills (ATLS) is IfL's optional, post-qualification process by which a teacher demonstrates through professional practice; The ability to use effectively the skills and knowledge acquired whilst training to be a teacher.