What obstacle clearance and navigation signal coverage is a pilot assured with the Minimum Sector Altitudes depicted on the IAP charts?

(Refer to figure 125.) If cleared for an S-LOC 17R approach at Lincoln Municipal from over TOUHY, it means the flight should

(Refer to figure 128.) At which points may you initiate a descent to the next lower minimum altitude when cleared for the VOR RWY 36 approach, from the PUC R 095 IAF (DME operative)?

Which clearance procedures may be issued by ATC without prior pilot request?

(Refer to figure 122.) The missed approach point of the ATL S-LOC 8L procedure is located how far from the LOM?