> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fusioncore.us/llms.txt
> Use this file to discover all available pages before exploring further.
# Conditions Overview
> Build reusable eligibility and pricing logic in fusionCore and attach it to price books, tax products, and renewal paths.
## Overview
A **Condition** (`Condition__c`) is a reusable rule that fusionCore evaluates at sale time to decide whether something applies. You build the logic once, then attach the Condition to a **Price Book**, a **tax product**, or a **Renewal Path** so that fusionCore turns the related pricing, tax, or renewal behavior on or off based on the order and the customer.
These are *not* Salesforce flow, Process Builder, or report filter conditions. A fusionCore Condition is a custom pricing-and-eligibility record that the commerce engine reads when it prices an order, applies tax, or chooses a renewal path.
**What a Condition can express**
A Condition combines one or more **Condition Lines**, each a single test. Together they let you say things like:
* *This price book only applies to members in California who already own the Annual Membership.*
* *Apply this tax only when the order ships to a taxable state.*
* *Send this account down a specific renewal path.*
## Where Conditions Are Used
Once a Condition exists, you attach it through a **Condition** lookup field on the consuming record:
| Attach a Condition to | What it controls |
| --------------------------------------- | ---------------------------------------------------- |
| A **Price Book** (`Pricebook2`) | Whether that price book's prices apply to the order. |
| A **tax product** (a `Product2` record) | Whether that tax is applied. |
| A **Renewal Path** (`Renewal_Path__c`) | Whether that renewal path is selected. |
## Condition Types
When you create a Condition, you choose a record type — **Simple** or **Apex**.
| Feature | Simple Conditions | Apex Conditions |
| --------------- | --------------------------------------------- | --------------------------------------- |
| **Built by** | Admins or standard users in the Salesforce UI | A developer, in Apex code |
| **Logic** | Condition Lines (no code) | A custom Apex class |
| **Best for** | Field-based eligibility and pricing rules | Complex, multi-record, or dynamic logic |
| **Maintenance** | Changed through the UI | Requires a developer to change |
Create a Condition record and choose whether it is Simple or Apex. Start here.
Build no-code logic from Condition Lines for the common eligibility and pricing cases.
Delegate complex logic to a custom Apex class for advanced scenarios.