to be relied upon

See: credible
References in periodicals archive ?
Not forgetting the obligatory appearance of the unemployed, complete with silly nicknames, and the tired old cliche of the camp character, always to be relied upon to cover up the gaping holes in the plot.
So long as the practitioner is aware that it is merely a starting point and not in any way a "rule" to be relied upon for final assessment, it is a useful tool.
What is the point of having an official spokesman if what he says is not to be relied upon?