HUD has published a notice concerning the 2016 passbook savings rate effective 2/1/2016. The rate is unchanged from last year and remains at 0.06% (0.0006). See HUD Notice 16-01. The rate is also applicable to Low Income Housing Tax Credit certifications.
This means that no annual certifications already completed for February or beyond, will have to be corrected to reflect a different rate.
Passbook Savings Rate Effective February 1, 2016 (pdf download)