tax on earnings are listed here - http://www.sii.cl/aprenda_sobre_impuestos/impuestos/imp_dire... - and the 40% rate applies to earnings over $12,500 a month (it's banded). there are also incentives for investment that count against that (so you invest the money in a pension fund, say, then that lowers your effective wage for tax purposes, i think (not completely sure)).

the 35% tax is described here - http://www.sii.cl/portales/inversionistas/imp_chile/impuesto... - and applies to earnings of people who don't live or have residence in chile. so it wouldn't apply to someone under this grant. also, it's not in addition to other taxes (so it's 18% over VAT, if that would have been charged - again, this is just from skimming the docs).

[edit: you need to translate the fourth paragraph to understand the "additional" nature. here's a link in english http://www.thisischile.cl/frmContenidos.aspx?SEC=187&ID=... that says This tax applies to those who are neither residents nor residing in Chile and ranges between zero and 35% on total revenue depending on the type of income (e.g., for services, royalties, interest, transportation payments, insurance, capital gains, and dividend distributions). In the case of utilities, the “First Category” tax can apply as a credit towards the additional tax.]

in general, chilean laws and taxes are all described online. you don't need to post uninformed speculation - you can search for the details. disclaimer: i just skimmed the links, and am no expert, so my summary may be incorrect.