# replacePolicy

`import { replacePolicy } from "destack:runtime";`

Replace one world's policy rules.

```ds title="replacePolicy"
export declare function replacePolicy(world: WorldHandle, rules: &'a readonly [PolicyRule]): Result<void, HostError>
```

[language/library/src/runtime/policy.ds:159:162](https://github.com/destack-sh/destack/blob/main/language/library/src/runtime/policy.ds#L159-L162)