The Fishtë and Leras Unit operated as a unit for youths during the 1972-1983 period. When Unit 315 was placed in Fishtë, there were around 300 convicts. After a while, it reached 550 convicts, whereas in July 1973, there were 740 convicts, of whom 35 were political. The convicts were exploited for land reclamation, agriculture and construction. The 1973 data mention around 700 convicts serving their sentence in the unit. They were divided in two sectors: in IshullLezhë (around 200 people) and Fishtë (around 500 people). Convicts were divided as follows: 23 for crimes against the state (political), 124 for theft of socialist wealth, 100 for sexual crimes, 20 for murder, 13 for accidents, 120 soldiers who had left units without permit, 24 unfit, and 120 others.
In 1974, the unit had almost 670 prisoners. They served their sentence in three different sectors: 200 in Fishtë, 70 in Ishull Lezhë and 400 in Leras (Torovicë). There were around 17 collaborators of the Security in the unit at this time. Prisoners were guarded by 16 officers, 17 non-commissioned officers and 47 soldiers. At the end of 1975, the unit experienced a leptospirosis (skin marks) outbreak.
In 1976, 962 convicts, of whom only 30 were political, worked there. The prison staff was made of 80 people. Records indicate that a part of the prisoners in 1976 worked in agriculture at the Bishti i Jubës area. In 1977, a total of 1,070 convicts worked in the unit.
According to a report dated 15 September 1981, there were 750 convicts in the unit, 11 (five for agitation and six for escape attempt) of whom were convicted for crimes against the state. The others were ordinary.
Prisoners worked in four groups with four brigades in agriculture. Through the 1982 amnesty, 523 convicts were released, of which it was highlighted that 12 were collaborators of the Security.
By order no. 4 dated 6 January 1983 of the minister of Internal Afairs, Unit 315 Leras Lezhë was closed.