A notification center shall:
(1) operate 24 hours a day every day of the year;
(2) have the capability to receive emergency information 24 hours a day from excavators and disseminate the information as soon as it is received to the appropriate operators and to all registered and affected notification centers operating in this state;
(3) have the capacity to receive extraordinary circumstance information 24 hours a day from operators and disseminate the information as soon as it is received to all registered and affected notification centers;
(4) submit to the corporation, not later than May 15 of each year, a pro rata share of the expense, as established by the corporation, of the statewide toll-free telephone number and the call router;
(5) provide, on request of an excavator, a contact name and telephone number of a representative of the operator for special circumstances; and
(6) have personnel capable of assisting Spanish-speaking customers.