"Set a clock that always belongs to the engine" would mean that I assign a clock to the engine, and that the engine keeps using that clock, even if it switches colors. That is what it actually says under "time". But then further down, it says: "This business of "clocks remaining with the engine" is apparently so ambiguous that many engines implement it wrong. The clocks in fact always remain with the color..."time N
Set a clock that always belongs to the engine. N is a number in centiseconds (units of 1/100 second). Even if the engine changes to playing the opposite color, this clock remains with the engine.
otim N
Set a clock that always belongs to the opponent. N is a number in centiseconds (units of 1/100 second). Even if the opponent changes to playing the opposite color, this clock remains with the opponent.
If needed for purposes of board display in force mode (where the engine is not participating in the game) the time clock should be associated with the last color that the engine was set to play, the otim clock with the opposite color.
This business of "clocks remaining with the engine" is apparently so ambiguous that many engines implement it wrong. The clocks in fact always remain with the color. Which clock reading is relayed with "time", and which by "otim", is determined by which side the engine plays. Note that the way the clocks operate and receive extra time (in accordance with the selected time control) is not affected in any way by which moves are made by the engine, which by the opponent, and which were forced.
That would mean that I assign a clock to a color, and if the engine switches colors, it will thus change to use the other clock.
So what is it; does the assigned clocks stick with the players (engine/opponent), or with the colors?
Also, this feature specifically states that with "times=0" the sending of time and otim can be disabled, and then immediately afterward, it says to never do that. If disabling this should never be done, then why is it possible? (Similar things are also said for other features, such as "always use..."; in that case, why have other options?)