[a little elbow grease]

That much has been the rule for at least half a century.

___

...... less than 10 years, I believe.

[lepton]

That much has been the rule for at least half a century.
___

...... less than 10 years, I believe.

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There were modifications a few decades ago and again around 5-7 years ago. None of theses changes affected whether that was a catch - only making it easier to make a catch.