Sample-based NSLA with system-wide monitoring purposes in place since 2001.
Irregular cycle of implementation: initially conduced twice a year, then yearly, and finally, biennially.
Different grades are assessed each year, on a rotatory basis.
Sample-based NSLA with system-wide monitoring purposes in place since 2001.
Irregular cycle of implementation: initially conduced twice a year, then yearly, and finally, biennially.
Different grades are assessed each year, on a rotatory basis.