Was invalidating stamps considered under 1970 Postal Reorganization Act?

The Postal Reorganization Act of 1970 changed the name of the United States Post Office Department and more. But there were things it didn’t change — despite rumors to the contrary.

U.S. Postal Service Act of 1792 – A Stamp A Day

How The Cost Of A Postage Stamp Affects Your Retirement, 50% OFF

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File:The Soviet Union 1970 CPA 3844 stamp (2nd Congress of the RSDRP (After Yuri Vinogradov)).jpg - Wikimedia Commons

How The Cost Of A Postage Stamp Affects Your Retirement, 50% OFF

Read the Supreme Court Decision - The New York Times

Postage stamps and postal history of the United States - Wikipedia

Postage Stamps And Postal History Of The United States: Most Up-to-Date Encyclopedia, News

Research uncovers new details about use of invalid stamps

Robert Reich (This One Thing May Stop Trump From Running For)

Anniversary of repeal of Stamp Act commemorated

1421-22 - 1970 6c Disabled American Veterans and Servicemen - Mystic Stamp Company

Any thoughts? : r/USPS

Postage Logo - LogoDix