> For the complete documentation index, see [llms.txt](https://docs.duplocloud.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.duplocloud.com/docs/aws-extension/aws-extension/policy-model/plan.md).

# Plan

A Plan catalogs AWS account-level resources that are shared across Environments — Route 53 hosted zones, ACM certificates, and AMIs. Rather than re-discovering these resources every time they are needed, a Plan captures them once and makes them available to any Environment that references the Plan.

Plans are associated with Environments at creation time. A single Plan can be referenced by multiple Environments.

## Spec

| Field                | Description                                                                                                              |
| -------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| **Region**           | The AWS region to catalog resources from                                                                                 |
| **Network Baseline** | The Network Baseline associated with this Plan. Used to scope the resource discovery to the right AWS account and region |

## Result

Once provisioned, the Plan result includes:

| Field                   | Description                                                                             |
| ----------------------- | --------------------------------------------------------------------------------------- |
| **Primary Hosted Zone** | The primary Route 53 hosted zone for DNS configuration (hosted zone ID and domain name) |
| **Certificates**        | ACM certificates available in the region, with their ARNs and domain names              |
| **AMIs**                | AMIs available for use in this region, with their IDs, names, and descriptions          |

## Dependencies

A Plan is linked to a **Network Baseline** for region and account context. Plans are referenced by **Environments** — an Environment's workloads and load balancers use the Plan's hosted zones and certificates for DNS and TLS configuration.

## What's next

Return to the [Policy Model overview](/docs/aws-extension/aws-extension/policy-model.md) or see how Plans are used when creating an [Environment](/docs/aws-extension/aws-extension/policy-model/environment.md).


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