Choose the correct passive voice: He is proposing this change in the procedure.

This change was being proposed by him in the procedure.

This change is being proposed by him in the procedure.

This change has been proposed by him in the procedure.

None of these

The given sentence is in present continuous tense ("is proposing").

The passive voice structure for present continuous is:
Object + is/are being + past participle + by subject.

"This change" (object) + "is being proposed" (passive form of "is proposing") + "by him" makes the correct transformation.