do all pay rates have to be published on rate cards?

[westyworker]

I belong to a large union in California. We have 6 or 8 different categories of workers, all with different pay scales. All categories and pay scales are published on a rate card that is distributed to all. Except the unique category I work in does not appear on the rate card. I know the union has negotiated different pay rates with different employers for my category, unlike all the other categories which have uniform pay rates from shop to shop. When I ask for a rate card for my category, it is available as a one-time print-out from a union executive's computer and it shows the differentials in pay from shop to shop. Are unions required to publish and acknowlege all existing categories on their rate cards?

[BattleOutWest]

If you work for a public/governmental agency, then that's probably the way it is.

Exact pay should be private, though.