UNSW in Sydney, Australia have produced the competency framework and toolkit.
The Intellectual Disability Mental Health Core Competency Framework: A Manual for Mental Health Professionals describes the specific skills and attributes required by mental health professionals for the provision of quality services to people with an intellectual disability. It outlines the necessary approaches to clinical practice when working with people with an intellectual disability and identifies the core competencies that mental health professionals require to work in this area. The Framework also includes a self-assessment tool to help professionals determine their current skill set and guides readers to resources that support professional development in intellectual disability mental health.
The Framework was developed in consultation with key stakeholders, and was funded by Mental Health-Children and Young People, NSW Ministry of Health.
More information and the toolkit is available here: