You can shoot the approach all day but the regs states two parts: Approach requirements and Landing requirements. The landing requirements states that you must have the required flight visibility to land the aircraft. Ironically, the visibility you get off the ATIS is based on ground visibility. If you use Jeppesen charts, you have an added benefit. It gives info on the runway markings. Each white stripe is 120' long and the space between them is 80' long. Thus with 9 stripes seen you have 1800' visibility.
Don't land without the prescribed visibility, it is only a way to lose you ticket you worked so hard to get.
Sec. 91.175 Takeoff and landing under IFR.
APPROACHES (a) Instrument approaches to civil airports.
Unless otherwise authorized by the Administrator, when an instrument
letdown to a civil airport is necessary, each person operating an aircraft,
except a military aircraft of the United States, shall use a standard
instrument approach procedure prescribed for the airport in part 97 of this
(b) Authorized DH or MDA. For the purpose of this section, when the
approach procedure being used provides for and requires the use of a DH or
MDA, the authorized DH or MDA is the highest of the following:
(1) The DH or MDA prescribed by the approach procedure.
(2) The DH or MDA prescribed for the pilot in command.
(3) The DH or MDA for which the aircraft is equipped.
(c) Operation below DH or MDA. Where a DH or MDA is applicable, no pilot
may operate an aircraft, except a military aircraft of the United States, at
any airport below the authorized MDA or continue an approach below the
authorized DH unless--
<font color="red"> </font> <font color="black"> </font> (i) The approach light system, except that the pilot may not descend below
100 feet above the touchdown zone elevation using the approach lights as a
reference unless the red terminating bars or the red side row bars are also
distinctly visible and identifiable.
(ii) The threshold.
(iii) The threshold markings.
(iv) The threshold lights.
(v) The runway end identifier lights.
(vi) The visual approach slope indicator.
(vii) The touchdown zone or touchdown zone markings.
(viii) The touchdown zone lights.
(ix) The runway or runway markings.
(x) The runway lights.
(d) LANDING. No pilot operating an aircraft, except a military aircraft of
the United States, may land that aircraft when the flight visibility is less
than the visibility prescribed in the standard instrument approach procedure