user151: It's possible to create a policy which can no longer be used to mint/burn after a given slot. The following object in a policy.script handles that:
{
      "type": "before",
      "slot": <insert slot here>
}

What if, however, one does not include this block (no before object in script) but eventually wants to lock the policy to prevent future burning/minting? Is this possible?

user5167: Nope. The contents of the script itself are used to actual generate the Policy ID. Once you mint something under that policy ID it's impossible to make a change.

151: <p>It's possible to create a policy which can no longer be used to mint/burn after a given slot. The following object in a <code>policy.script</code> handles that:</p>
<pre><code>{
      &quot;type&quot;: &quot;before&quot;,
      &quot;slot&quot;: &lt;insert slot here&gt;
}
</code></pre>
<p>What if, however, one does not include this block (no <code>before</code> object in script) but eventually wants to lock the policy to prevent future burning/minting? Is this possible?</p>
 5167: <p>Nope. The contents of the script itself are used to actual generate the Policy ID. Once you mint something under that policy ID it's impossible to make a change.</p>
