fireOnChange event not getting triggered

I am trying to run the javascript to make a field required if one of the "Type" field value is "Third Party License".  Type field gets data from Javascript hence doesnt gets triggered for another Javascript.

I tried calling fireOnchange but still the javascript get triggered when value is changed manually.

See code below:

function RemarksVisibility()
{
Xrm.Page.getAttribute("new_types").fireOnChange(test);

function test()
{
if(Xrm.Page.getAttribute("new_types").getValue() === 100000003) {

Xrm.Page.getAttribute("new_remarks").setRequiredLevel("required");

}
else {
Xrm.Page.getAttribute("new_remarks").setRequiredLevel("none");
}
}
}

Any help will be appreciated