Where a verb is used with more than one auxiliary (e.g. "he must and shall go") make sure that the main verb is repeated unless, as in this example, its form is the same. It is easy to slip into such a sentence as:
The steps which those responsible can and are at present taking to remedy this state of affairs.
Can taking makes no sense. The proper construction is shown in:
The board must take, and are in fact taking, all possible steps to maintain production.