The International Cricket Council announced on Wednesday that teams will be allowed two additional reviews after 80 overs in an innings in Test matches where the Decision Review System is used from October 1.
Currently, a team is allowed only two unsuccessful reviews per innings.
The decision to introduce the new trial was taken at the two-day ICC Chief Executives' meeting, in Dubai, which also decided to form a 'Working Group' to review the objectivity of the DRS.
"A trial will be conducted whereby a team's referrals will be topped up to two reviews after 80 overs of an innings. This trial will start from 1 October 2013 in all Test matches in which the DRS is used, with the results being monitored and considered by the Working Group," a statement from the ICC read.
With the DRS generating a lot of controversy in the just-concluded Ashes series, the ICC felt the need to streamline the system.
"The CEC agreed that a Working Group be constituted to consider how the ICC should best use technology in umpire decision-making in the future.
"The considerations of the group will be wide ranging and include a review of the objectives and philosophies of using the technologies, protocols and procedures as well as the role and training of television umpires," the statement added.
The CEC reviewed the performance of the Decision Review System during the Ashes series and received an update on a technology trial that was conducted during the Old Trafford Test.
During its Chief Executives' meeting, the ICC also discussed a range of issues, relating to umpires, over-rates, bad light, use of technology in umpiring and ODI playing conditions.
"Following due consideration of the Cricket Committee's views and the arguments for and against retaining the two new balls provision, opinions of the CEC members remained divided and, as such, the current playing condition remains as is.
"The CEC also approved the ICC Cricket Committee's recommendation that in an ODI reduced to 25 overs or less prior to the start of first innings, only one new ball will be used per innings. This regulation will come into effect from 1 October 2013.
"The CEC asked the ICC Cricket Committee to prioritise investigations into the development of a ball that can last the full 50 overs of an innings whilst still providing a fair balance between bat and ball," added the statement.
The ICC also confirmed the launch of a World Test Championship in October, coinciding with the start of the Pakistan versus South Africa Test series.
"It has been an excellent engagement in which we discussed a series of issues, some of which will be taken forward to the ICC Board which will meet in London next month.
The unanimous support for the authority of the umpires and commitment to the Spirit of Cricket was particularly pleasing," ICC Chief Executive David Richardson said.
Among other decisions, the ICC also amended the Code of Conduct as previously agreed by the ICC Board at the June meeting, preventing the tactic of a team switching its captain to avoid an over rate suspension on the captain.
It also confirmed an amendment to the ICC Player Eligibility Regulations as previously agreed by the ICC Board at the June meeting, providing that the standout period for a Full Member player who wishes to return to his original Associate or Affiliate Member shall be reduced from four years to two years.
It also approved a set of guidelines/regulations for the use of broadcast cameras on/over the field during international matches.