How to visit seetha devi lake in devikulam

Hi,

As a general tourist, how can we visit the seetha devi lake in devikulam munnar? I heard that this needs some permits- please let me know if anybody is aware of the process- i am keen to explore this place along with my family during my next week visit to Munnar.

Also how exactly we need to approach this place? does it need a uphill trek?