1# Application Access Control Subsystem Changelog
2
3## cl.sucurity_access_token.1 Changes in the Event Subscription and Cancellation APIs
4
5**Change Impact**
6
7The applications developed based on earlier versions are not affected.
8
9**Key API/Component Changes**
10
11Involved APIs:
12interface/sdk-js/api/@ohos.privacyManager.d.ts:
13
14privacyManager.on
15
16privacyManager.off
17
18From this version:
19
20Multiple callbacks can be registered if **permissionList** is the same.
21
22The same callback cannot be registered if **tokenIDList** is overlapped.
23
24If callback is not passed in **privacyManager.off**, all callbacks under **permissionList** will be unregistered.
25