Q. I am a CSRS Offset employee with 30-plus years’ service. My marriage to my same-sex partner is recognized by my state of residence but not by the federal government due to the Defense of Marriage Act. Because of DOMA, I cannot provide for a spousal survivor annuity, but I believe I could qualify (legally and in terms of health status) to provide an insurable interest annuity for him should I die first. Since there is less than three years’ difference in our ages, this seems like a close substitute for a surviving spouse annuity. What are the differences between the two? Will…