Actually, it doesn't. It defines, in part, what reconciliation is, not how to get it.
(Non-imputation of sins is the bare minimum; God seeks to completely remove our sins from us along with all of the damage they've caused. He doesn't stop at mere non-imputation.)
Read also verse 18: "And all things are of God, who HATH RECONCILED US UNTO HIMSELF BY JESUS CHRIST, and hath given to us the ministry of reconciliation;".
It's past tense. It is ALREADY HAPPENED. It is not an ongoing process of reconciliation. Unless you believe you play a part in the reconciliation process. Then you work and suffer and work some more, all works of the flesh, not at all to the edifying of the spirit. Making a fair shew in the flesh, with outward signs, fasting, an ash cross on your forehead, the mass, etc, but accomplishing nothing except a pat on your back and all the atta-boys the flesh can muster.