> ## Documentation Index
> Fetch the complete documentation index at: https://docs.monolith.market/llms.txt
> Use this file to discover all available pages before exploring further.

# Immutability Deadline

> Time‑locked switch that permanently disables sensitive controls, making an instance credibly neutral after launch.

# Immutability Deadline

## Overview

Each instance has an immutability deadline: a timestamp after which sensitive parameters and admin actions permanently lock. This turns the instance into a credibly‑neutral system with no ongoing configuration powers over protocol behavior.

## Why it exists

* Early flexibility: Gives operators the ability to finetune parameters after launch.
* Predictability: Once locked, users can rest assured that the rules will never change.
* Safety: Eliminates the possibility of human error, building Lindiness over time.

## How it’s set

* On deployment, the deadline is set to `deployTimestamp + timeUntilImmutability`.
* `timeUntilImmutability` is bounded (at most 4 years) and can be `0` for immediate immutability at launch.
* Before the deadline, the operator may call an early lock by calling `enableImmutabilityNow()` (irreversible, cannot be delayed or reopened later).

## What the deadline locks

After the deadline passes (or is enabled early), the following become permanently unavailable:

* Interest policy knobs:
  * Half‑life of rate changes (exponential rate)
  * Target free‑debt ratio band
  * Redemption fee basis points
* PSM‑related mutability:
  * The buy path (asset→coin) through the PSM wrapper

These gates ensure the instance’s monetary policy surface cannot be altered after the lock, and that exposure to the PSM asset can no longer increase.

## What remains adjustable (intentionally)

Only fee-related actions remain accessible by the operator:

* Operator/manager rotation
* Local reserve fee bps for the instance operator (bounded by a 10% cap)
* Pulling the instance operator fee

## Related

* [Interest Rate Controller](/protocol/interest-rate-controller)
* [Paid vs Free Debt](/protocol/paid-vs-free-debt)