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Rh obligation to purchase articles of consumption in specified shops or places.

(f) Stipulations permitting the retention of wages by way of fines.

(g) Stipulations constituting a waiver on the part of the workman of the indemnities to which he may become entitled by reason of labor accidents or occupational diseases, damages for breach of contract, or for discharge from work.

(h) All other stipulations implying the waiver of any right vested in the workman by labor laws.

XXVIII. The law shall decide what property constitutes the family patrimony. These goods shall be inalienable and shall not be mortgaged, nor attached, and may be bequeathed with simplified formalities in the succession proceedings.

XXIX. Institutions of popular insurance established for old age, sickness, life, unemployment, accident and others of a similar character, are considered of social utility; the Federal and State Governments shall therefore encourage the organization of institutions of this character in order to instill and inculcate popular habits of thrift.

XXX. Cooperative associations for the construction of cheap and sanitary dwelling houses for workmen shall likewise be considered of social utility whenever these properties are designed to