This document addresses guiding principles and gives policy recommendations in relevant areas in recruitment and selection of ab initio trainee controllers and in related areas. The main focus is on implementation, quality assurance and maintenance of appropriate selection tools and methods. Administration and professional practices in recruiting, selection and training are addressed with a view to help to introduce new or to adjust existing policies. The aim is higher effectiveness (validity), efficiency in the use of methods and tools throughout the whole recruitment, selection and training process. In addition the guidelines describe professional practices in regard to quality assurance of the recruiting, selection and training system that will help to target potential problems or shortcomings in an existing system or to implement new methods. This is done with the aim to maintain and improve the quality and validity of used methods and tools.