Two such provisions are bicameralism and presentment in the enactment of law. He defended bicameralism and the election of the President of the Republic by universal suffrage. The 1970 Constitution abandon bicameralism and opts for a single room. After the adoption of 1993 Russian Constitution bicameralism was introduced in some regions. In a few countries, bicameralism involves the juxtaposition of democratic and aristocratic elements. The constitutional project then shifted from pursuing unicameralism to bicameralism. There have been a number of rationales put forward in favour of bicameralism. See also Bicameralism (psychology). Additionally, there are also differences in the degree of bicameralism. It introduced for the first time bicameralism and direct elections in the country. Scientific explanations consider this a coping mechanism or an example of bicameralism. Central to the plot is the theory of bicameralism. The last region to switch from bicameralism to unicameralism was Sverdlovsk Oblast in 2012. When this is the case, the legislature may be called an example of perfect bicameralism. The two chambers are equal (perfect bicameralism).