This is quite possibly one of the most appalling threads I've read in quite some time. I was asked to reply, and will do so, albeit reluctantly. Reading this thread has been much like watching goats; it sucks the intelligence right out of anything nearby like a a mental vacuum.
Some very basic assertions in the thread are disturbing. There is nothing "controlling" about a Jeppesen chart. Jeppesen doesn't invent data for the charts; they use state-provided data, and put it in their format. They do publish specific numbers for specific clients, in certain cases.
Touchdown RVR values are controlling. Jeppesen charts do not "control." Published numbers (when greater than standard) do take precedence, but Jeppesen is a commercial company which does not invent numbers and does not "control."
Where takeoff minimums are published that are greater than standard, they're the lowest numbers that may be used. Where takeoff minimums are not published, then standard, or any applicable lower-than-standard minimums may be used. If RVR is available, it's to be used...even if the published numbers don't use RVR. That's why there are conversion charts.
Several assertions were made regarding "interpretations" of the OpSpecs...and there's nothing to "interpret." Both the regulation, and the Operations Specifications are clear. OpSpec C056 spells out without question the heirarchy regarding what standards can be used for a takeoff, and OpSpec C078 spells out the specific numbers that the operator may use.
OpSpec C056 states that if takeoff minimums are published that are greater than standard (1 mile for 2 engines, 1/2 mile for more than 2 engines), then the published minimums apply. Period.
Per the OpSpec, "When a published takeoff minimum is greater than the applicable standard takeoff minimum and an alternate procedure (such as a minimum climb gradient compatable with aircraft capabilities) is not prescribed, the certificate holder shall not use a takeoff minimum lower than the published minimum. The Touchdown RVR Report, if available, is controlling."
If published minimums are equal to or less than standard, then standard or lower minimums may be used, as authorized for that certificate holder.
C056 also states that RVR will be used when it's available. This is stated for good reason, as it's more accurate, more applicable to the runway visibility (as opposed to what's seen from the tower), and most importantly, it's the legal standard accorded the operator. Even where RVR isn't provided in the published minimums, the operator must use RVR and convert the values, if RVR is available.