| Field | Type | Required | Description | 
|---|---|---|---|
| when | JsonArray | + | Array of the possible blocks related to the current devices/items which are included. By them full set of rules is filtered | 
OR
| Field | Type | Required | Description | 
|---|---|---|---|
| then | JsonArray | + | Array of the possible blocks related to the current devices/items which are included. By them full set of rules is filtered |