He took his oath before governor Edgardo Tallado at the Provincial Capitol at around 12:45 pm.
Also in attendance were punong barangays.
Herrera's oath-taking comes after the suspenson order against mayor Agnes Ang was served at her office in the town hall of Vinzons.
It was Rey Pajarillo, the provincial jail warden, who was directed by Tallado to serve the suspension order.
It will be recalled that Sangguniang Panlalawigan Resolution 159-2015, which recommended Ang's suspension, was approved yesterday by the governor.
It put the mayor under preventive suspension for 60 days.
Aside from Herrera, topnotcher councilor Raul Banal was also sworn into office as acting town vice-mayor.