Block users from updating Rate on Order Items screen

AI generated answer (using internal Slack threads):

To block users from updating the Rate on the Order Items screen, you would need to create a script that disables the rate field on the transaction line. You might also want to disable the total amount field. Here is a sample script that disables the quantity field if the status of the record is 'fullyBilled'. You can modify this script to disable the rate field instead:

javascript
/**
 * @NApiVersion 2.x
 * @NScriptType UserEventScript
 */
define(['N/ui/serverWidget'],
    function(serverWidget) {
        function beforeLoad(scriptContext) {
            var record = scriptContext.newRecord;
            var status = record.getValue('statusRef');

            if(status === 'fullyBilled'){
                scriptContext.form.getSublist('item').getField('rate').updateDisplayType({displayType: serverWidget.FieldDisplayType.DISABLED});
            }
        }
        return {
            beforeLoad: beforeLoad
        };
    });

This script should be deployed to the roles that you want to restrict. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******