The event will also be monitored for an appearance by leader Kim Jong-Un who has not been seen in public for several weeks, prompting speculation in South Korea about his health.
The Supreme People's Assembly meets only once or twice a year, mostly for day-long sessions to rubber-stamp budgets or other decisions made by the ruling party.
The second session was announced earlier this month by the North's official KCNA news agency, but with no mention of the planned agenda.
Scrutiny of the North's opaque leadership structure intensified following the execution last December of Kim Jong-Un's uncle and political mentor, Jang Song-Thaek.
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Kim normally attends the parliamentary sessions and any absence this time around will fuel rumours of health issues.
Kim has not been seen since he attended a concert with his wife on September 3. Previous video footage on state media had shown him walking with a pronounced limp.
"I call on the international community to stand with us in tearing down the world's last remaining wall of division," she told the assembly.
Park also reiterated her pledge to engage North Korea if it pursues "a different path" that includes giving up nuclear weapons.