After some searching, I found the missing instructions for the right front part, so I will be able to finish my project.
Vogue Knitting Spring 2016 errata

Pattern #21 Textured Vest
Shown on page 72, instructions begin on page 97.
Updated 10Mar2016

Instructions for completing the right front were inadvertently omitted. After left front is complete, work as foll:

Join yarn to 22 (23, 25, 26, 27) sts on hold for right front ready to work a RS row.
Dec row (RS) Sl1, pick up loop between last st worked and next st on needle and place on RH needle (does not count as a stitch), k1, ssk, work to end.
Next row (WS) Work to loop and ptog with last st.
Rep last 2 rows 12 (13, 13, 13, 13) times more—9 (9, 11, 12, 13) sts. Work even in pat until armhole measures same as left front to shoulder, end with a WS row. Bind off rem sts.