Meaning of 'come into force'

[Kawaii]

Test No. incompl/advan-35 "One is always going to lose...", question 7

The government next announces that measures are due to come into ......... that will change the whole process.

(a) forces
(b) forced
(c) force
(d) forcing

Test No. incompl/advan-35 "One is always going to lose...", answer 7

The government next announces that measures are due to come into force that will change the whole process.

Correct answer: (c) force

Your answer was: incorrect
The government next announces that measures are due to come into forces that will change the whole process.
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Dear Alan:
Can you explain me more the meaning of "come into" ? It is a phrasal verb, isn't it?

[Torsten]

Yes come into is a phrasal verb and the combination come into force is a fixed expression which means that something becomes vaild or effective.

TOEIC listening, photographs: Working together