Controls applicable to suppliers

Answer: Basically you will have to apply the same controls your risk assessment identified as applicable if you were running the operation yourself, plus the controls related to supplier management, identified in Annex A.15 of ISO 27001

This article will provide you further explanation about controls applicable to suppliers:
- 6-step process for handling supplier security according to ISO 27001 https://advisera.com/27001academy/blog/2014/06/30/6-step-process-for-handling-supplier-security-according-to-iso-27001/

These materials will also help you regarding controls applicable to suppliers:
- Book Secure & Simple: A Small-Business Guide to Implementing ISO 27001 On Your Own https://advisera.com/books/secure-and-simple-a-small-business-guide-to-implementing-iso-27001-on-your-own/
- Free online training ISO 27001 Foundations Course https://advisera.com/training/iso-27001-foundations-course/