[2] During World War II Luvsan served as deputy prime minister under Khorloogiin Choibalsan.
After his appointment to the Politburo of the MPRP Committee Committee in 1963, Luvsan became one of Mongolia's most powerful politicians and was often pictured at the side of Prime Minister and Secretary General of the Mongolian People's Revolutionary Party (MPRP) Yumjaagiin Tsedenbal.
Shortly after the death of the long-serving president Jamsrangiin Sambuu, Luvsan was removed from the post of First Vice Premier and elected to be First Vice-President and acting Chairmen of the Presidium of the People's Great Khural (titular head of state of the MPR) on June 29, 1972, replacing Tsagaanlamyn Dügersüren who was acting Chairman for one month.
Prime Minister Tsedenbal had planned to ascend to the position himself after Sambuu's death, but political and health considerations caused him to delay this move.
On June 11, 1974, Tsedenbal resigned his chairmanship of the Council of Ministers (prime minister) and upon Luvsan's enthusiastic endorsement was unanimously elected to the Chairmanship of the People's Great Khural, ending Luvsan's tenure as acting president.