President Rodrigo Duterte imposed martial law in Mindanao island on May 23 following the siege laid by the ISIL-linked Maute group in the city of Marawi.
The submission of the recommendation came out to be earlier than what the Armed Forces of the Philippines have been pronouncing the past week.
The Philippine National Police and Armed Forces are both recommending the president extend martial law on the island of Mindanao, the scene of fierce government fighting against ISIL-linked militants for almost two months.
The PNP position was revealed a day after Defense Secretary Delfin Lorenzana reported that the DND had already given last week its recommendation on the issue of martial law extension.
"We will have to wait for the president's final decision on the matter", Lorenzana was quoted by ABS-CBN news as saying.
What I submitted to him was my recommendation from the security sector as Administrator of Martial Law in Mindanao after consulting with the CSAFP (Chief of Staff) Gen. (Eduardo) Año.
Other factors that President Duterte will weigh are the reports of other agencies of the government, including that from the Department of Interior and Local Government and the Philippine National Police, he added.
Lorenzana refused to give additional details so as not to "pre-empt" any announcement, but maintained that he will "fully trust" the President's judgment. The 15-day timeline he sough to address the problem in war-torn city is beyond the 60-day period of martial law implementation in Mindanao.
Soldiers partol the gate of the Marawi City Hall.
In the same statement on Sunday, Lorenzana described the upcoming rehabilitation and rebuilding works in Maraw as "more daunting considering the extent of damage wrought into the city".