adopted, and on 1 January 1977 the CGTE was transformed into the TPG, an autonomous government agency of the canton of Geneva. Renaissance (1977–1992) In 1978, the tracks of the last remaining tramway were renewed under the auspices of the "new" TPG. Planning of the proposed new lines was addressed. However, it was only on 12 June 1988, with the adoption of a new cantonal law about public transport, that the first concrete building proposals were presented. From 1995, these proposals then became the basis of larger network extensions. By that time, the most pressing modernisation of existing operations had already occurred. In 1984, in Bachet-de-Pesay in the municipality of Lancy, construction work had begun on the new Bachet tram depot. To connect the new facility with the existing network, the route of line 12 was extended on 27 September 1987 by one kilometre (0.6 mi) from Carouge to Bachet. The sidings and maintenance facility in Bachet were opened in 1988, and in 1990 the associated tram and trackwork construction workshop was commissioned. Finally, in 1992, the new administration building was opened. Since then, it has been the headquarters of the TPG. In 1987–1989, the TPG procured a total of 45 new, partly low floor, articulated trams, based on the prototype Be 4/6 tram no. 741, which had joined the TPG fleet in 1984. The new trams were supplied by Ateliers de Constructions Mécaniques de Vevey (ACMV) in Villeneuve, Vaud, in collaboration with Düwag and BBC / ABB. The colloquial expression "DAV", which is used to denote these vehicles, is an acronym for Düwag - Ateliers de Vevey. Following this new procurement, TPG's existing fleet of old trams could be completely withdrawn, as future network expansion, including the introduction of new lines 13 and 16, had already been taken into account when the order for the new trams was placed. Network expansion (1992–2006) In 1988, a referendum on the proposed new network expansion projects was unsuccessful. The first phase of development of the network therefore became the construction of a central Plainpalais–Carouge–Bachet–Palettes–Acacias–Plainpalais ring link, and the crossing of the Rhône to the Genève-Cornavin railway station, with a continuation to the Place des Nations and United Nations Office at Geneva. On 28 May 1995, line 13 (Cornavin–Bachet) was opened, and trams returned to the other side of the Rhône. On 28 June 1997, line 13 was extended from Bachet to Palettes