Matrix Question - Disable Forced Response on One Item

I have a survey with forced responses on all items, but one question (in a four-item matrix table) needs to have forced response turned off. The text of the question says "skip this item if you are not a voter." For now, I have set the entire four-item matrix question to "Request Response" so respondents *can* skip that single item. I'd prefer to set it up so three questions have Forced Response and I use custom code to override that setting on the single item. Any idea if this can be done with JS or other custom code?