(a)      The following described areas within Montgomery County are hereby added to the Lower Montgomery County Metropolitan District:

      Beginning at a point on the Rockville Pike (Md. Route 355) lying 0.72 mile north of the intersection of said Rockville Pike and Norris Street, and continuing in a northwesterly direction 1.57 miles along Rockville Pike (Md. Route 355) to Shady Grove Road.

      Thence northerly along Shady Grove Road .80 mile to the grade crossing over the B & O Railroad.

      Thence crossing the B & O Railroad and continuing northeasterly .10 mile to the corporate limits of Washington Grove.

      Thence along the eastern and northern corporate limits of Washington Grove 1.00 mile to the intersection with the Gaithersburg-Laytonsville Road (Md. Route 124).

      Thence northerly on the Gaithersburg-Laytonsville Road (Md. Route 124) 2.59 miles to the intersection with Warfield Road.

      Thence northeasterly along the Warfield Road 1.10 miles to the Laytonsville corporate limits (at Claysville Road).

      Thence southeasterly along the Claysville Road (Md. Route 108) 5.48 miles to the intersection with Georgia Avenue (Md. Route 97) at Olney.

      Thence southerly along Georgia Avenue (Md. Route 97) 3.03 miles to the intersection with the existing Maryland-Washington Metropolitan District line approximately 300 feet north of the intersection with the Norwood Road (Md. Route 609).

      Thence southwesterly along the existing Maryland-Washington Metropolitan District line which is parallel to, and 300 feet north of, the Norbeck Road (Md. Route 28), approximately 2.66 miles to a point where the existing metropolitan district line intersects the maximum expansion line of Rockville, said point lying approximately 1200 feet southwest along the existing Maryland-Washington Metropolitan District line from the easterly 1010.63 foot line of the property of J. B. and M. C. Shapiro as recorded at Liber 1827, Folio 82 of the land records of Montgomery County, Maryland.

      Thence proceeding with the said Rockville and Maryland-Washington Metropolitan District expansion line N 37\'ba 30' W, 1930 feet to a point.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line N 66\'ba W, 2250 feet to a point.

      Thence turning and continuing in a northerly direction with said Rockville and Maryland-Washington Metropolitan District expansion line, said line being also the west boundary of the Francis Horner property as recorded at Liber 624, Folio 148 of the land records of Montgomery County, Maryland, 1848 feet to a point.

      Thence turning and leaving said Francis Horner property and with said Rockville and Maryland-Washington Metropolitan District expansion line in a northwesterly direction, 565 feet, said line being also the south property line of the A. H. Lagasse property as recorded at Liber 1031, Folio 233 of the land records of Montgomery County, Maryland.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line and leaving the A. H. Lagasse property line, S 46\'ba 30' W, 710 feet to a point on the northerly line of the Daisy P. Hull property as recorded at Liber 916, Folio 225 of the land records of Montgomery County, Maryland.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line along said northerly property line of said Daisy P. Hull property N 44\'ba 30' W, 1110 feet to a point lying within the boundary of Michael Pakneck property as recorded at Liber 1230, Folio 577 of the land records of Montgomery County, Maryland.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line in a southwesterly direction 2650 feet to a point on the east property line of A. Gude Sons Company as recorded at Liber 382, Folio 371 of the land records of Montgomery County, Maryland.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line along said easterly line of A. Gude Sons property in a southerly direction, 264 feet to the southeast corner of said A. Gude Sons property.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line with the southerly property line of said A. Gude Sons property in a northwesterly direction, 1619 feet to a point.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line and still with A. Gude Sons southerly property line in a northerly direction 757.30 feet to a point.

      Thence turning and continuing with said Rockville and Maryland-Washington Metropolitan District expansion line and still with A. Gude Sons southerly property line, in a westerly direction crossing the Baltimore and Ohio Railroad right-of-way, 2450 feet to a point of intersection of the Maryland-Washington Metropolitan District expansion line, said point being the point of beginning, lying on the Rockville Pike (Maryland Route 355).

      (b)      No municipal corporation within the areas added by this section to the Maryland-Washington Metropolitan District shall be authorized, by means of an amendment to its charter or otherwise, to exercise any of the powers relating to planning, subdivision control and/or zoning now or hereafter granted to the Maryland-National Capital Park and Planning Commission or the County Council of Montgomery County. If this section shall for any reason be held by any court of competent jurisdiction to be invalid, it is hereby declared to be the intention of the General Assembly that this section would have been enacted without the invalid portion.