> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-docs-add-b20-spec.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# IPolicyRegistry.isAuthorized

> Generated B20 reference for isAuthorized(uint64,address).

[Related concept](/base-chain/specs/upgrades/beryl/b20/specification/concepts/policies-and-scopes)

## Signature

```solidity theme={null}
function isAuthorized(uint64 policyId, address account) external view returns (bool);
```

| Field               | Value                          |
| ------------------- | ------------------------------ |
| Selector            | `0x55a1179e`                   |
| Canonical signature | `isAuthorized(uint64,address)` |

## Description

Returns whether `account` is authorized under `policyId`. Never reverts; unknown
or malformed IDs collapse to empty-member-set semantics (ALLOWLIST -> false,
BLOCKLIST -> true).
Dev: Callers that store policy IDs MUST validate `policyExists(policyId)` at write time.
Param: policyId Policy to query.
Param: account  Account to check.
Return: Whether `account` is authorized.

## Access control

Read-only or ERC-20-standard access rules unless the NatSpec states otherwise.

## Policy interaction

This is part of the singleton PolicyRegistry surface used by B20 policy scopes.

## Example

```solidity theme={null}
bool ok = StdPrecompiles.POLICY_REGISTRY.isAuthorized(policyId, account);
```

## Related

* [IPolicyRegistry reference](/base-chain/specs/upgrades/beryl/b20/specification/reference/interfaces/IPolicyRegistry)
* [Constants & addresses](/base-chain/specs/upgrades/beryl/b20/specification/reference/constants-and-addresses)