What interests me are the number of repeals (starting at page 11). Articles 116 through 157.
What was repealed?
We still need the old version to determine this.
Here's a link to the original law, but it's in graphic form, so I don't think the automatic net translators will translate it. Apparently the numbers of the provisions (articles) remain the same in the revised version. I believe that's the usual practice with laws that are revised in most countries.
For instance, the commentary being quoted by Doug from Upland in post 1 refers to Article 38 -- "The Secretary of Governance may 'suspend or prohibit the admission of foreigners when he determines it to be in the national interest.' (Article 38)."
When I look up Article 38 in the original, I see, "Es facultad de la Secretaría de Gobernación, suspender o prohibir la admisión de extranjeros, cuando así lo determine el interés nacional." Even without knowing Spanish, you can probably tell from the similarity of some of the words that it's speaking of the same thing.
In the 2015 revised version of that article, there's just "Artículo 38.-(Se deroga)". They've repealed (eliminated) it. I suspect that some of these powers still exist, but they are no longer conspicuously on display in that prominent law.
Here's a page that contains links to the original law and many revisions, including the current one (Texto Vigente) that repeals so many of the provisions.