Originally Posted by
DELee
So it must be true.
It is in TSA Security Directive 1542-21-01A. The security directive was issued by the TSA under authority granted under 49 U.S.C. 114 and 44903; 49 CFR 1542.303.
https://www.tsa.gov/sites/default/fi...542-21-01a.pdf
The "between bites and sips" language comes from paragraph C.D.2 on page 3 of the pdf file.
The current security directive expires on September 13, 2021.