https://www.faa.gov/documentlibrary/media/advisory_circular/ac_90-66b.pdf Section 8.2.1 of the above AC clearly states that traffic patterns are not regulated. This is blowing my mind. I arrived here after reading another message where the owner of a public use airport is advising to make left (standard) traffic to approach a runway for favoring winds, where it has been long standing (tradition?) to make right traffic to that runway because of the adjacent parallel airport on that side of the field. Collision avoidance 101: Don't be where another aircraft could be. I distinctly recall (but can't find) that it should be in FAR 91 that the printed chart direction is regulatory. This airport has RP on the VFR sectional to that runway. Please help me to recall correctly.