The REST API deprecation policy should be consumed in additional to any other relevant deprecation policies. When there is a conflict of policy, the most restrictive policy should be followed.
All effort should be taken to notify consumers, through all relevant communication channels of new deprecations.
Publicly accessibly REST APIs must be given reasonable notice of deprecations. Any deprecated REST API in the cloud environment MUST be available in it's original form for at least 6 months, UNLESS there are critical security vulnerabilities or these APIs are provided by plugin extensions as noted above.
Requests which are made to deprecated APIs SHOULD return a header on the response to notify the consumer that the endpoint is deprecated