...
2.3.1 Elected members of MAB will serve staggered four-year terms. Board members will be divided into two types of approximately equal size. The first MAB appointments during December 2012 will include seven voting members with fourwithsix-year appointments and six voting members with twofour-year appointments.
2.3.2 No Board member representing Contributing or High-Contributing Organizations may serve more than one consecutive four-year term.
...
Revisions on October 9, 2012
Revision on October 6, 2014 (corrected number of 2-year terms)
Revision on December 17, 2014 (corrected a typo in 2.3.2)
Revision on December 17, 2014 (reset the number of 2- and 4-year appointments to correct the October 6, 2012 revision)
Revision on August 34, 2015 (The initial idea of 2-4 year staggering terms did not take into consideration the time needed for the group to come together as a team around a common set of goals and identify productive ways of contributing to arXiv. Given the fact that MAB is a new governance unit, we feel that the first couple of years were spent in clarifying and better formulating the actual role of MAB in arXiv's governance. MAB unanimously decided to modify 2.3.1: Elected members of MAB will serve staggered four-year terms. Board members will be divided into two types of approximately equal size. The first MAB appointments during December 2012 will include seven voting members with six-year four-year appointments and six voting members with four-year two-year appointments.)
...