The NOT Condition is an operator to negate a condition you define e.g. check if Layer is not assigned (NOT LayerAssigned). Triggers when the condition is not true.

Add Multiple Conditions

To add multiple conditions for your Business Rule. 

1. Open Settings
2. Open Business Rules
3. Go to the panel Condition
4. Press Add
5. Select AND or OR condition first to define multiple conditions. 
6. Define the condition details
   1. For AND, OR: Press Add inside AND or OR condition and select your desired condition.
   2. For other conditions see the definitions per condition.

Video on how to add multiple conditions.

Specific Definitions

None, except the selection of one or multiple other conditions. 

Condition Check on Layer and Permission Set

Check if Layer BasicInformation is not assigned and Content Permission Set is not assigned.

{
    "kind": "AndCondition",
    "conditions": [
        {
            "kind": "NotCondition",
            "condition": {
                "kind": "LayerAssignedCondition",
                "layerId": "BasicInformation"
            }
        },
        {
            "kind": "NotCondition",
            "condition": {
                "kind": "ContentPermissionSetAssignedCondition",
                "permissionSetId": "4db7c1f54dfc4e4193836c30754a6fcb"
            }
        }
    ]
},