This one stumped both myself and my CFI. Im specifically asking about the minimums at [KALB IL/LOC 19](https://aeronav.faa.gov/d-tpp/1903/00010IL19.PDF) but a general answer is also appreciated. 

The plate lists two distinct sets of minimums and we were confused about the S-LOC 19 minimums. The first set seems like the obvious regular ones and takes you to the labeled step down altitude. Then there is a second set for *WESTS FIX MINIMUMS* that are lower to the first set. 

**What is this second of set of minimums for and how can they be utilized?** 

It seems a bit odd that they reference an altitude below the step altitude. Presumably you fly 820 to 0.7 on the DME, but yet the *WESTS FIX MINIMUMS* seem to allow for lower than this. 

(full plate for reference incase it changes) 
[![enter image description here](https://i.stack.imgur.com/FlWKB.jpg)](https://i.stack.imgur.com/FlWKB.jpg)