LONDON, July 9 (Reuters) – Board directors of banks must take ultimate responsibility for outsourced services and document how they manage the risk of outages and disruptions to customer services, the global Basel Committee of banking regulators proposed on Tuesday.

Banks increasingly use third-party tech companies, such as Microsoft (MSFT.O), opens new tab, Amazon (AMZN.O), opens new tab and Google (GOOGL.O), opens new tab, for cloud computing to run key services, raising concerns among regulators about the impact on the financial sector if a provider used by many banks went down.