The third reading—and the final chance for the Lords to change the Bill—took place on 5 May 2016 and no amendments were made.
The Bill now goes to the Commons for its consideration but as the 2015/16 session of parliament has ended this Bill will make no further progress this year.
What is being proposed is to reduce 'the prescribed limit' to:
22 microgrammes of alcohol in 100 millilitres of breath (now 35)
50 milligrammes of alcohol in 100 millilitres of blood (now 80)
67 milligrammes of alcohol in 100 millilitres of urine (now 107)
The issue the Commons will consider (among others) is the effect on drink driving in Scotland where the limit has been lower since December 2014 .
Justice Secretary Michael Matheson said: "Since the Scottish government lowered the drink-drive limit last December, all the statistics are going in the right direction - fewer people are being caught, but more importantly there's a shift in attitudes to even having one drink and driving, and indeed driving the next day after drinking.”
The number of drink-driving offences in Scotland fell by 12.5% (4,208 to 3,682) since the legal limit was lowered in December 2014 compared with the same period the previous year.
Meanwhile, a survey has suggested that 82% of Scots believe that drinking any alcohol before driving is unacceptable. Only one in 20 respondents said they would drive themselves home after they had been drinking on a night out. More than two thirds (67%) said they would not consider driving the morning after drinking.