---
title: PrepayFrequencyExtensions
summary: API reference for PrepayFrequencyExtensions.
status: draft
owner: Technical Writer
last_reviewed: 2026-07-31
library: SAIF.Business.Policy.Rating
reference_type: package
---
# PrepayFrequencyExtensions
Filters prepay frequencies to those active on a date. The module keeps only frequencies that have a discount row in force on the requested date.
## Purpose
- Filters prepay frequencies to those active on a date.
- The module keeps only frequencies that have a discount row in force on the requested date.
## Context
- Namespace: `SAIF.Business.Policy.Rating`
- Assembly/package: `SAIF.Business.Policy.Rating`
## Public members
| Member | Signature | Purpose |
| --- | --- | --- |
| ActiveAsOf | `Public Function ActiveAsOf(ByVal Target As IEnumerable(Of clsPrepayFrequency), ByVal inAsOfDate As Date) As IEnumerable(Of clsPrepayFrequency)` | Returns only frequencies whose discount-factor lookup succeeds on the specified date. |
## Behavioral notes
- The extension checks each frequency by asking it for a discount factor on the requested date and keeps only rows that return a match.
## Constraints and usage notes
- Use this extension after loading frequencies when a workflow needs to hide options with no effective discount row on the target date.
## Sources
- `Business\SAIF.Business.Policy.Rating\clsPrepayFrequencyCollection.vb`