A recruitment and selection policy is a statement of principles, outlining how your organisation should conduct its recruitment and selection process.
The aim of such a policy is to ensure that a transparent and unbiased recruitment and selection process is followed; one that results in the appointment of the best candidate, based solely on merit and best-fit with your organisational values, philosophy, and goals.
More information: http://recruitloop.com/blog/5-reasons-you-need-a-recruitment-and-selection-policy/