I am not sure that they do not have their own, but I DO KNOW that the law limiting former Presidents to ten years goes into effect with President Bush (43). We are stuck paying for them to guard Clinton as long as he lives.
Read the code; former first ladies do NOT get SS proetection if they aren't married anymore; Lady Bird gets it by act of Congress, but she will be the last one.
And Chelsea is NOT entitled to it, period. No other child of any past president has EVER had it past the age of 15. Jackie Kennedy refused it for HER children and paid for theirs. Of course, the Clintons would NEVER do that.
The SS contingent that the Clintons have is HIS.....and he has to "give" the agents to Hillary and Chelsea, if they get them.