Yes requires reaching the cumulative minimum while it remains possible; preserve the needed spendable spice. No forbids reaching that minimum during the rest of this turn. Smaller payments to the named recipient add together. Prior payments, gifts and ally aid do not count.
The sender pays immediately. The recipient can spend the payment only at Mentat Pause. Ordinary bribes can be paid out of turn when the current bribe controls permit them; original timing and payment rules still apply. {' '}Bribe promise rules.