Tier 1 – up to 3 members:
A small library in terms of ACESL membership. Often run by an individual and/or by volunteers, or as a small part of a larger organisation. Many new sling libraries will fall into this category, as will many offering carrier hire as part of a consultancy service. Stock levels, average hire rate or regular support hours are lower than other sling library services in the area, or in an area of comparative character and density.