Total crap;either it is a security risk and it has to be removed yesterday or it is not. 2027 is meaningless.
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>Except that it's already been decided the towers will be removed, which is counter to your example.
Grandfather clauses are implementation grace periods that are equal to the expected lifetime of the device. This is not counter to the example -- this is an example that sometimes these grace periods are very generous even for things we are very sure are unsafe.