Ths Tisbury police department this week announced it has been certified by the Massachusetts Police Accreditation Commission.

"This achievement is the product of years of dedication and diligence towards the refinement of policies and procedures required to meet the standards of the commission," interim police chief Christopher Habekost said in a statement.

Edgartown's police force was first to achieve the certification in 2017, while in 2018 West Tisbury achieved accreditation with the commission.

Certification is based on 159 mandatory standards; accreditation is based on 382 standards, 257 of which are mandatory.