The Planning Commission shall hold a public hearing on the proposed plat if required by any applicable statute of the State, and shall rule on the proposed plat within twenty days after its referral to the Commission by the City Clerk. The Commission shall determine whether or not the proposed plat conforms to the Master Plan, or such portions thereof as have been promulgated, to the Zoning Code and to the design standards of these Subdivision Regulations. In particular, the Commission shall determine whether or not the proposed plat provides for adequate and convenient open spaces for traffic, both vehicular and pedestrian, utilities, access of fire-fighting apparatus, recreation, light and air and for the avoidance of congestion of population, including the minimum width and area of lots. The Commission shall recommend the location of, and whether there should be, pedestrian crosswalks across blocks over 600 feet long as provided for in these Subdivision Regulations. In general, such crosswalks shall be recommended where necessary to promote the convenient and orderly flow of pedestrian traffic to schools, parks, playgrounds, shopping centers or other recognized centers of activity. When the Commission deems that amendment of the plat is necessary to conform to the Master Plan and/or to incorporate its recommendations as described herein, conditional approval may be granted subject to such amendment.