# Sandbox access request: authorization policy rules in sandbox

**URL:** <https://community.fireblocks.com/t/sandbox-access-request-authorization-policy-rules-in-sandbox/3183>\
**Category:** Developer Discussion\
**Tags:** help-center\
**Created:** [July 15, 2026, 1:08am UTC](https://community.fireblocks.com/t/sandbox-access-request-authorization-policy-rules-in-sandbox/3183 "2026-07-15T01:08:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lamkeo](https://avatars.discourse-cdn.com/v4/letter/l/48db29/32.png) [@lamkeo](https://community.fireblocks.com/u/lamkeo)\
**Post date:** [July 15, 2026, 1:08am UTC](https://community.fireblocks.com/t/sandbox-access-request-authorization-policy-rules-in-sandbox/3183/1 "2026-07-15T01:08:32Z")

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Hello, I need to be able to add and modify transaction authorization policy rules in my sandbox.

I would like to create a Fireblocks Policy for the Gas Station ERC20 Fee Wallet, but my users are unable to create it. Could you please help me with this? The details are as follows:

**Policy Details**

1. **Policy Name:** Gas Station ERC20 Fee Wallet
2. **Wallet Type:** Internal Wallet (Gas Station)
3. **Supported Networks:** All required EVM/ERC20 networks (Ethereum.)
4. **Purpose:** Automatically fund gas fees for ERC20 token transactions from designated vault accounts.
5. **Permissions:**

- Allow internal transfers to the Gas Station wallet.

- Allow auto-fueling for approved vault accounts.

- Restrict external withdrawals from the Gas Station wallet.

- Require approval workflow as per workspace governance for any manual transfers.

**Objective:**

The Gas Station wallet will maintain the native assets (ETH) required to pay network gas fees for ERC20 token transfers. When a monitored vault account has insufficient gas balance, Fireblocks will automatically fund it based on the configured Gas Station settings.