Just stumbled on this while looking into the HAVEN Act which is likely to pass both the House and Senate and would exclude Veterans disability from the Means Test just like Social Security, as there are other retirement benefits that mirror those and are protected from creditors outside of bankruptcy.
This exemption for the surviving spouses of Lighthouse keepers isn't included on my local exemptions schedules, neither in Section 15 of the MDNC Form 91-C nor Sections 16 or 17 of the EDNC Schedule C. I doubt its included elsewhere, maybe Michigan or Maine, which have the most lighthouses. Given that even in 1975 when President Ford signed this into law, it appears there were only 339 widows receiving this benefit, its rather unlikely that it will come up.33 U.S. Code §771. Benefits for surviving spouses of Lighthouse Service employees; death of employee during retirement; amount of payment
(1) any former employee of the Lighthouse Service has died or shall hereafter die at a time when that employee was receiving or was entitled to receive retirement pay under section 763 of this title, as amended and supplemented, and
(2) the surviving spouse of the former employee was married to the former employee prior to the retirement of the former employee from the Lighthouse Service and has not remarried—
the surviving spouse, so long as the surviving spouse does not remarry, shall be paid $100 per month by the Secretary of Transportation.
33 U.S. Code §775. Payments nonassignable and exempt from process
No payment under sections 771 to 775 of this title shall be assignable, either in law or in equity, or be subject to execution, levy, lien, attachment, garnishment, or other legal process.
But anyways, here's a gif to creditors that have kept this exemption hushed up so they can squeeze those poor, few remaining lighthouse keeper's widows: