It shows that you have broad knowledge and expertise within the profession and requires rigorous validation of your abilities. (mb-guide.org)
Initially only available through British Council training centres, TYLEC is now available to any training centre that meets Trinity's rigorous validation criteria. (trinitycollege.com)
Rest assured that there is nothing wrong with your EPUB if you are a customer of ours, as every EPUB passes the IDPF's rigorous validation standards. (bbebooksthailand.com)