The Welsh Assembly Government has published a draft bill which will for the first time make Welsh citizens organ donors by default.
The so-called opt-out system of organ donation assumes that all citizens are willing to donate organs upon their death, unless they make an application to opt-out of the system.
Countries including Spain and Austria already use opt-out systems, and have some of the highest rates of organ donation in the world.
The legislation, published on Monday, will be the first in the UK to address such a scheme. The Welsh Assembly estimates that the law could result in an extra 15 donors each year, adding 45 organs to the transplant list.
The system will still allow families to intervene to prevent organ harvesting, as doctors will only be allowed to take the body of the deceased to theatre with the assistance of their attending family. Only patients who die in hospital will be eligible for consideration.
The bill was published yesterday and will be passed in 2013, with the new system up and running by 2015.
The Welsh system received 83 donors in 2010, but there is still a long waiting list for organs and it is hoped the new law will improve the system. It is thought that the money saved by one transplant could pay for the entire system to be implemented.
Opponents of the law argue that some countries like Sweden who already operate 'opt-out' have low donation rates, whilst the country with the highest rates, Spain, acknowledges that its opt-out policy is not the main reason for its excellent donation rates.
Lesley Griffiths is the Health Minister for Wales.
"I believe the time has come to introduce a change in the law together with an extensive communication and education programme encouraging people to make a decision and to ensure their families know their wishes," she said.