Changing permissions of shared items

1. Shared by owner

1.1. CAN

1.1.1. Override all permissions at current level

1.1.2. Override permissions for users granted by another users.

1.1.3. Override permissions at below levels

1.1.4. Revoke permissions

1.1.5. View users at all levels

1.2. CANNOT

1.2.1. -

2. Shared by another user

2.1. CAN (has edit permissions)

2.1.1. Grant permissions to new users

2.1.1.1. Can grant edit permission

2.1.1.2. Can grant view permission

2.1.1.3. Can grant read permission

2.1.2. Grant permissions at below levels

2.1.3. Change permissions for users which weren't given by owner at levels below

2.1.4. View users at levels below

2.2. CANNOT

2.2.1. Change permissions for users which were given by owner

2.2.2. Change permissions for users at same level

2.2.3. Change permissions for users at level(s) above

2.2.4. View user at same level or levels above