There are various ways to join CoST and receive support. This guidance note explains what they are
and is designed to help  potential members decide which form of membership is best for them.

The three options for applying the CoST approach to infrastructure are as a member, an affiliate or by  using the range of tools and resources available on our website. This guidance note explains each option including the support available and the rights and responsibilities associated with each approach.

It also explains how to apply to join CoST as a member or affiliate, what should be included in an application and where it should be submitted. It concludes by describing the relationship between the two categories of membership and the circumstances in which members might move between them at various stages of their reform process.