Parish governing authorities shall provide for the support of all infirm, sick and disabled paupers residing within the limits of their respective parishes except those who may reside in municipal corporations either exempt or partially exempt from parish taxation.  Parish governing authorities shall adopt such measures as they deem just and necessary to ascertain the names, situation and condition of all infirm, sick and disabled paupers in order that they may provide for the entire support of the utterly destitute and helpless and for the partial support or assistance of others, according to their circumstances and condition.