Jesse Helms: "Keep Clinton out of UN"

Some say President Clinton wouldn't be eligible to become Sec/Gen of the UN because we are a member of the Security Council and the Sec/Gen must be from a non-member nation. What rule made by man cannot be changed, amended or revised? Apparently Jesse Helms is concerned about Bill Clinton running the United Nations:

CHARLOTTE, N.C -- Bill Clinton in charge of the United Nations?

That's the image former U.S. Sen. Jesse Helms is dangling in front of his ardent supporters in a letter aimed at raising money for his senatorial library.

In the letter, the 83-year-old Republican, who left office in 2003 after five terms, worries that the former president has aspirations to lead the U.N. after Kofi Annan retires next year.