validation rules for the newsletter subscriber in different fields

I added a custom field for the newsletter subscriber. So total 2 fields for the subscriber form.
I added a custom JS file for the form validation. This “custom-validate-email” work perfectly fine. What I need to do, so that other postal code field “custom-postal-code” can be validate by other rules?

 define([
    'jquery'
], function ($) {
    'use strict';

    return function() {
        $.validator.addMethod(
            'custom-validate-email',
            function (value) {
                return $.mage.isEmptyNoTrim(value) || /^([a-z0-9-_.+]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+(.([a-z0-9-_.+]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+)*@([a-z0-9-]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+(.([a-z0-9-]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+)*.(([a-z]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF]){2,})$/i.test(value);
            },
            $.mage.__('Please enter a valid email address (Ex: johndoe@domain.com).')
        );
    }
});

Below doesn’t work for me, I am not good at JS, please help

define([
    'jquery'
], function ($) {
    'use strict';

    return function() {
        $.validator.addMethod(
            'custom-validate-email',
            function (value) {
                return $.mage.isEmptyNoTrim(value) || /^([a-z0-9-_.+]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+(.([a-z0-9-_.+]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+)*@([a-z0-9-]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+(.([a-z0-9-]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])+)*.(([a-z]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF]){2,})$/i.test(value);
            },
            $.mage.__('Please enter a valid email address (Ex: johndoe@domain.com).')
        );
        $.validator.addMethod(
        'custom-postal-code': [
            function (value) {
                return /^[a-zA-z]{1}[0-9]{1}[a-zA-z]{1}s[0-9]{1}[a-zA-z]{1}[0-9]{1}$/.test(value);
            },
            $.mage.__('Please enter a valid postal code (Ex.: A1B 2C3 or A1B2C3).')
        );      
    }
});